40633918 has 16 divisors (see below), whose sum is σ = 67415040. Its totient is φ = 18246816.

The previous prime is 40633909. The next prime is 40633919. The reversal of 40633918 is 81933604.

It is a super-2 number, since 2×40633918² = 3302230584061448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40633919) 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, 20158 + ... + 22081.

It is an arithmetic number, because the mean of its divisors is an integer number (4213440).

Almost surely, 2^40633918 is an apocalyptic number.

40633918 is a deficient number, since it is larger than the sum of its proper divisors (26781122).

40633918 is a wasteful number, since it uses less digits than its factorization.

40633918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42291.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 40633918 is about 6374.4739390792. The cubic root of 40633918 is about 343.7923695213.

The spelling of 40633918 in words is "forty million, six hundred thirty-three thousand, nine hundred eighteen".