400505412 has 24 divisors (see below), whose sum is σ = 940113216. Its totient is φ = 132701728.

The previous prime is 400505401. The next prime is 400505419. The reversal of 400505412 is 214505004.

It is not an unprimeable number, because it can be changed into a prime (400505419) by changing a digit.

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, 97923 + ... + 101930.

It is an arithmetic number, because the mean of its divisors is an integer number (39171384).

Almost surely, 2^400505412 is an apocalyptic number.

It is an amenable number.

400505412 is an abundant number, since it is smaller than the sum of its proper divisors (539607804).

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

400505412 is a wasteful number, since it uses less digits than its factorization.

400505412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200027 (or 200025 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 400505412 is about 20012.6313112494. The cubic root of 400505412 is about 737.1164947391.

The spelling of 400505412 in words is "four hundred million, five hundred five thousand, four hundred twelve".