400854012 has 24 divisors (see below), whose sum is σ = 1007274576. Its totient is φ = 123339648.

The previous prime is 400854011. The next prime is 400854019. The reversal of 400854012 is 210458004.

It is a super-2 number, since 2×400854012² = 321367877872992288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400854011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1284633 + ... + 1284944.

It is an arithmetic number, because the mean of its divisors is an integer number (41969774).

Almost surely, 2^400854012 is an apocalyptic number.

It is an amenable number.

400854012 is an abundant number, since it is smaller than the sum of its proper divisors (606420564).

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

400854012 is a wasteful number, since it uses less digits than its factorization.

400854012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2569597 (or 2569595 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 400854012 is about 20021.3389162663. The cubic root of 400854012 is about 737.3302948411.

The spelling of 400854012 in words is "four hundred million, eight hundred fifty-four thousand, twelve".