400550164 has 12 divisors (see below), whose sum is σ = 801100384. Its totient is φ = 171664344.

The previous prime is 400550119. The next prime is 400550201. The reversal of 400550164 is 461055004.

400550164 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7152654 + ... + 7152709.

Almost surely, 2^400550164 is an apocalyptic number.

It is an amenable number.

400550164 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

400550164 is a wasteful number, since it uses less digits than its factorization.

400550164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14305374 (or 14305372 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 400550164 is about 20013.7493738680. The cubic root of 400550164 is about 737.1439485577.

It can be divided in two parts, 400 and 550164, that added together give a square (550564 = 742²).

The spelling of 400550164 in words is "four hundred million, five hundred fifty thousand, one hundred sixty-four".