396957891136 has 28 divisors (see below), whose sum is σ = 796564038060. Its totient is φ = 196248842240.

The previous prime is 396957891107. The next prime is 396957891149. The reversal of 396957891136 is 631198759693.

It can be written as a sum of positive squares in 2 ways, for example, as 197363393536 + 199594497600 = 444256^2 + 446760^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34839625 + ... + 34851016.

It is an arithmetic number, because the mean of its divisors is an integer number (28448715645).

Almost surely, 2^396957891136 is an apocalyptic number.

It is an amenable number.

396957891136 is an abundant number, since it is smaller than the sum of its proper divisors (399606146924).

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

396957891136 is an equidigital number, since it uses as much as digits as its factorization.

396957891136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69690742 (or 69690732 counting only the distinct ones).

The product of its digits is 66134880, while the sum is 67.

The spelling of 396957891136 in words is "three hundred ninety-six billion, nine hundred fifty-seven million, eight hundred ninety-one thousand, one hundred thirty-six".