400550118 has 16 divisors (see below), whose sum is σ = 801296496. Its totient is φ = 133484000.

The previous prime is 400550099. The next prime is 400550119. The reversal of 400550118 is 811055004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400550119) 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, 42868 + ... + 51368.

It is an arithmetic number, because the mean of its divisors is an integer number (50081031).

Almost surely, 2^400550118 is an apocalyptic number.

400550118 is an abundant number, since it is smaller than the sum of its proper divisors (400746378).

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

400550118 is a wasteful number, since it uses less digits than its factorization.

400550118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16359.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 400550118 is about 20013.7482246580. The cubic root of 400550118 is about 737.1439203394.

The spelling of 400550118 in words is "four hundred million, five hundred fifty thousand, one hundred eighteen".