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1398408648 = 2337213234197
BaseRepresentation
bin101001101011010…
…0000010111001000
310121110100112000220
41103112200113020
510330443034043
6350432430040
746440164100
oct12326402710
93543315026
101398408648
1165840212a
123303a8320
13193942350
14d3a1a200
1582b7d483
hex535a05c8

1398408648 has 384 divisors, whose sum is σ = 4729777920. Its totient is φ = 340623360.

The previous prime is 1398408643. The next prime is 1398408653. The reversal of 1398408648 is 8468048931.

It is an interprime number because it is at equal distance from previous prime (1398408643) and next prime (1398408653).

It is a self number, because there is not a number n which added to its sum of digits gives 1398408648.

It is not an unprimeable number, because it can be changed into a prime (1398408643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14416536 + ... + 14416632.

It is an arithmetic number, because the mean of its divisors is an integer number (12317130).

Almost surely, 21398408648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1398408648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2364888960).

1398408648 is an abundant number, since it is smaller than the sum of its proper divisors (3331369272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1398408648 is a wasteful number, since it uses less digits than its factorization.

1398408648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 51.

The square root of 1398408648 is about 37395.3024857401. The cubic root of 1398408648 is about 1118.2649175985.

The spelling of 1398408648 in words is "one billion, three hundred ninety-eight million, four hundred eight thousand, six hundred forty-eight".