400556154 has 16 divisors (see below), whose sum is σ = 822764448. Its totient is φ = 129910032.

The previous prime is 400556153. The next prime is 400556171. The reversal of 400556154 is 451655004.

It is not an unprimeable number, because it can be changed into a prime (400556153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901932 + ... + 902375.

It is an arithmetic number, because the mean of its divisors is an integer number (51422778).

Almost surely, 2^400556154 is an apocalyptic number.

400556154 is an abundant number, since it is smaller than the sum of its proper divisors (422208294).

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

400556154 is a wasteful number, since it uses less digits than its factorization.

400556154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804349.

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

The square root of 400556154 is about 20013.8990204308. The cubic root of 400556154 is about 737.1476230623.

The spelling of 400556154 in words is "four hundred million, five hundred fifty-six thousand, one hundred fifty-four".