40400732 has 24 divisors (see below), whose sum is σ = 72382464. Its totient is φ = 19725552.

The previous prime is 40400713. The next prime is 40400743. The reversal of 40400732 is 23700404.

It is a happy number.

It is a super-2 number, since 2×40400732² = 3264438292271648, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33443 + ... + 34629.

It is an arithmetic number, because the mean of its divisors is an integer number (3015936).

Almost surely, 2^40400732 is an apocalyptic number.

It is an amenable number.

40400732 is a deficient number, since it is larger than the sum of its proper divisors (31981732).

40400732 is a wasteful number, since it uses less digits than its factorization.

40400732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385 (or 1383 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 40400732 is about 6356.1570150524. The cubic root of 40400732 is about 343.1334666896.

The spelling of 40400732 in words is "forty million, four hundred thousand, seven hundred thirty-two".