396624740 has 12 divisors (see below), whose sum is σ = 832911996. Its totient is φ = 158649888.

The previous prime is 396624737. The next prime is 396624749. The reversal of 396624740 is 47426693.

It can be written as a sum of positive squares in 2 ways, for example, as 303038464 + 93586276 = 17408^2 + 9674^2 .

It is a super-2 number, since 2×396624740² = 314622368760135200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (396624749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9915599 + ... + 9915638.

It is an arithmetic number, because the mean of its divisors is an integer number (69409333).

Almost surely, 2^396624740 is an apocalyptic number.

It is an amenable number.

396624740 is an abundant number, since it is smaller than the sum of its proper divisors (436287256).

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

396624740 is a wasteful number, since it uses less digits than its factorization.

396624740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19831246 (or 19831244 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 396624740 is about 19915.4397390567. The cubic root of 396624740 is about 734.7280157368.

The spelling of 396624740 in words is "three hundred ninety-six million, six hundred twenty-four thousand, seven hundred forty".