397915536 has 80 divisors (see below), whose sum is σ = 1055718144. Its totient is φ = 129088512.

The previous prime is 397915523. The next prime is 397915543. The reversal of 397915536 is 635519793.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525270 + ... + 526026.

Almost surely, 2^397915536 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 397915536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (527859072).

397915536 is an abundant number, since it is smaller than the sum of its proper divisors (657802608).

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

397915536 is a wasteful number, since it uses less digits than its factorization.

397915536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048 (or 1042 counting only the distinct ones).

The product of its digits is 765450, while the sum is 48.

The square root of 397915536 is about 19947.8203320563. The cubic root of 397915536 is about 735.5241982246.

The spelling of 397915536 in words is "three hundred ninety-seven million, nine hundred fifteen thousand, five hundred thirty-six".