400451012 has 24 divisors (see below), whose sum is σ = 756704256. Its totient is φ = 184331808.

The previous prime is 400450991. The next prime is 400451033. The reversal of 400451012 is 210154004.

It is an interprime number because it is at equal distance from previous prime (400450991) and next prime (400451033).

It is a super-2 number, since 2×400451012² = 320722026023648288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9863 + ... + 29969.

It is an arithmetic number, because the mean of its divisors is an integer number (31529344).

Almost surely, 2^400451012 is an apocalyptic number.

It is an amenable number.

400451012 is a deficient number, since it is larger than the sum of its proper divisors (356253244).

400451012 is a wasteful number, since it uses less digits than its factorization.

400451012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20507 (or 20505 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 400451012 is about 20011.2721234808. The cubic root of 400451012 is about 737.0831194490.

The spelling of 400451012 in words is "four hundred million, four hundred fifty-one thousand, twelve".