400055512 has 16 divisors (see below), whose sum is σ = 750966840. Its totient is φ = 199797696.

The previous prime is 400055503. The next prime is 400055519. The reversal of 400055512 is 215550004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400055519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21253 + ... + 35380.

Almost surely, 2^400055512 is an apocalyptic number.

It is an amenable number.

400055512 is a deficient number, since it is larger than the sum of its proper divisors (350911328).

400055512 is a wasteful number, since it uses less digits than its factorization.

400055512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57522 (or 57518 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 400055512 is about 20001.3877518536. The cubic root of 400055512 is about 736.8403828109.

The spelling of 400055512 in words is "four hundred million, fifty-five thousand, five hundred twelve".