400426012 has 24 divisors (see below), whose sum is σ = 802418400. Its totient is φ = 171275520.

The previous prime is 400426003. The next prime is 400426051. The reversal of 400426012 is 210624004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864 + ... + 28312.

It is an arithmetic number, because the mean of its divisors is an integer number (33434100).

Almost surely, 2^400426012 is an apocalyptic number.

It is an amenable number.

400426012 is an abundant number, since it is smaller than the sum of its proper divisors (401992388).

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

400426012 is a wasteful number, since it uses less digits than its factorization.

400426012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27981 (or 27979 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 400426012 is about 20010.6474657868. The cubic root of 400426012 is about 737.0677805262.

The spelling of 400426012 in words is "four hundred million, four hundred twenty-six thousand, twelve".