1398975240 has 192 divisors, whose sum is σ = 4596315840. Its totient is φ = 340454400.

The previous prime is 1398975239. The next prime is 1398975251. The reversal of 1398975240 is 425798931.

It is a self number, because there is not a number n which added to its sum of digits gives 1398975240.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 2047939 + ... + 2048621.

It is an arithmetic number, because the mean of its divisors is an integer number (23939145).

Almost surely, 2^1398975240 is an apocalyptic number.

1398975240 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 1398975240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2298157920).

1398975240 is an abundant number, since it is smaller than the sum of its proper divisors (3197340600).

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

1398975240 is a wasteful number, since it uses less digits than its factorization.

1398975240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824 (or 807 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 1398975240 is about 37402.8774294171. The cubic root of 1398975240 is about 1118.4159260095.

The spelling of 1398975240 in words is "one billion, three hundred ninety-eight million, nine hundred seventy-five thousand, two hundred forty".