400935918 has 16 divisors (see below), whose sum is σ = 802114560. Its totient is φ = 133604856.

The previous prime is 400935911. The next prime is 400935919. The reversal of 400935918 is 819539004.

It is a super-2 number, since 2×400935918² = 321499220685005448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400935911) 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, 16921 + ... + 32987.

It is an arithmetic number, because the mean of its divisors is an integer number (50132160).

Almost surely, 2^400935918 is an apocalyptic number.

400935918 is an abundant number, since it is smaller than the sum of its proper divisors (401178642).

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

400935918 is a wasteful number, since it uses less digits than its factorization.

400935918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20231.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 400935918 is about 20023.3842793869. The cubic root of 400935918 is about 737.3805106807.

The spelling of 400935918 in words is "four hundred million, nine hundred thirty-five thousand, nine hundred eighteen".