400156554 has 32 divisors (see below), whose sum is σ = 939367296. Its totient is φ = 111240000.

The previous prime is 400156541. The next prime is 400156571. The reversal of 400156554 is 455651004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127197 + ... + 130304.

It is an arithmetic number, because the mean of its divisors is an integer number (29355228).

Almost surely, 2^400156554 is an apocalyptic number.

400156554 is an abundant number, since it is smaller than the sum of its proper divisors (539210742).

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

400156554 is a wasteful number, since it uses less digits than its factorization.

400156554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257550.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 400156554 is about 20003.9134671194. The cubic root of 400156554 is about 736.9024121681.

The spelling of 400156554 in words is "four hundred million, one hundred fifty-six thousand, five hundred fifty-four".