400032012 has 24 divisors (see below), whose sum is σ = 958636336. Its totient is φ = 129739968.

The previous prime is 400032007. The next prime is 400032037. The reversal of 400032012 is 210230004.

It is a super-2 number, since 2×400032012² = 320051221249536288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450043 + ... + 450930.

Almost surely, 2^400032012 is an apocalyptic number.

It is an amenable number.

400032012 is an abundant number, since it is smaller than the sum of its proper divisors (558604324).

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

400032012 is a wasteful number, since it uses less digits than its factorization.

400032012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901017 (or 901015 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 400032012 is about 20000.8002839886. The cubic root of 400032012 is about 736.8259547398.

Adding to 400032012 its reverse (210230004), we get a palindrome (610262016).

The spelling of 400032012 in words is "four hundred million, thirty-two thousand, twelve".