400253612 has 24 divisors (see below), whose sum is σ = 765730560. Its totient is φ = 181550160.

The previous prime is 400253591. The next prime is 400253647. The reversal of 400253612 is 216352004.

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, 12089 + ... + 30767.

It is an arithmetic number, because the mean of its divisors is an integer number (31905440).

Almost surely, 2^400253612 is an apocalyptic number.

It is an amenable number.

400253612 is a deficient number, since it is larger than the sum of its proper divisors (365476948).

400253612 is a wasteful number, since it uses less digits than its factorization.

400253612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19181 (or 19179 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 400253612 is about 20006.3392953334. The cubic root of 400253612 is about 736.9619859289.

The spelling of 400253612 in words is "four hundred million, two hundred fifty-three thousand, six hundred twelve".