397715136 has 336 divisors, whose sum is σ = 1392228864. Its totient is φ = 97763328.

The previous prime is 397715117. The next prime is 397715141. The reversal of 397715136 is 631517793.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3861261 + ... + 3861363.

Almost surely, 2^397715136 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 397715136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (696114432).

397715136 is an abundant number, since it is smaller than the sum of its proper divisors (994513728).

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

397715136 is a wasteful number, since it uses less digits than its factorization.

397715136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 145 counting only the distinct ones).

The product of its digits is 119070, while the sum is 42.

The square root of 397715136 is about 19942.7965942593. The cubic root of 397715136 is about 735.4007014961.

The spelling of 397715136 in words is "three hundred ninety-seven million, seven hundred fifteen thousand, one hundred thirty-six".