396071712 has 72 divisors (see below), whose sum is σ = 1192598316. Its totient is φ = 124256256.

The previous prime is 396071671. The next prime is 396071713. The reversal of 396071712 is 217170693.

It is a happy number.

396071712 is a `hidden beast` number, since 39 + 607 + 1 + 7 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 340181136 + 55890576 = 18444^2 + 7476^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×396071712² = 313745602093221888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (396071713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35553 + ... + 45344.

Almost surely, 2^396071712 is an apocalyptic number.

396071712 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

396071712 is an abundant number, since it is smaller than the sum of its proper divisors (796526604).

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

396071712 is a wasteful number, since it uses less digits than its factorization.

396071712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80930 (or 80919 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 396071712 is about 19901.5504923611. The cubic root of 396071712 is about 734.3863710857.

The spelling of 396071712 in words is "three hundred ninety-six million, seventy-one thousand, seven hundred twelve".