40218604 has 12 divisors (see below), whose sum is σ = 71080128. Its totient is φ = 19910000.

The previous prime is 40218601. The next prime is 40218613. The reversal of 40218604 is 40681204.

It is a super-2 number, since 2×40218604² = 3235072215417632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40218601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49372 + ... + 50179.

It is an arithmetic number, because the mean of its divisors is an integer number (5923344).

Almost surely, 2^40218604 is an apocalyptic number.

It is an amenable number.

40218604 is a deficient number, since it is larger than the sum of its proper divisors (30861524).

40218604 is a wasteful number, since it uses less digits than its factorization.

40218604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99656 (or 99654 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 40218604 is about 6341.8139360912. The cubic root of 40218604 is about 342.6170704630.

Adding to 40218604 its reverse (40681204), we get a palindrome (80899808).

The spelling of 40218604 in words is "forty million, two hundred eighteen thousand, six hundred four".