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1399945320 = 2332537227463
BaseRepresentation
bin101001101110001…
…0111100001101000
310121120020120221200
41103130113201220
510331341222240
6350525404200
746456224144
oct12334274150
93546216850
101399945320
11659261704
12330a09660
1319405c917
14d3cda224
1582d83930
hex53717868

1399945320 has 192 divisors, whose sum is σ = 4703512320. Its totient is φ = 360847872.

The previous prime is 1399945247. The next prime is 1399945321. The reversal of 1399945320 is 235499931.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1399945321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3023409 + ... + 3023871.

It is an arithmetic number, because the mean of its divisors is an integer number (24497460).

Almost surely, 21399945320 is an apocalyptic number.

1399945320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1399945320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2351756160).

1399945320 is an abundant number, since it is smaller than the sum of its proper divisors (3303567000).

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

1399945320 is a wasteful number, since it uses less digits than its factorization.

1399945320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The square root of 1399945320 is about 37415.8431683692. The cubic root of 1399945320 is about 1118.6743776272.

It can be divided in two parts, 13999 and 45320, that added together give a cube (59319 = 393).

The spelling of 1399945320 in words is "one billion, three hundred ninety-nine million, nine hundred forty-five thousand, three hundred twenty".