396957726 has 64 divisors (see below), whose sum is σ = 971308800. Its totient is φ = 119167200.

The previous prime is 396957707. The next prime is 396957731. The reversal of 396957726 is 627759693.

396957726 is a `hidden beast` number, since 3 + 9 + 69 + 577 + 2 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61681 + ... + 67811.

It is an arithmetic number, because the mean of its divisors is an integer number (15176700).

Almost surely, 2^396957726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 396957726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (485654400).

396957726 is an abundant number, since it is smaller than the sum of its proper divisors (574351074).

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

396957726 is a wasteful number, since it uses less digits than its factorization.

396957726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6262 (or 6256 counting only the distinct ones).

The product of its digits is 4286520, while the sum is 54.

The square root of 396957726 is about 19923.7979813087. The cubic root of 396957726 is about 734.9335716724.

The spelling of 396957726 in words is "three hundred ninety-six million, nine hundred fifty-seven thousand, seven hundred twenty-six".