40212664 has 32 divisors (see below), whose sum is σ = 80686800. Its totient is φ = 18731520.

The previous prime is 40212661. The next prime is 40212713. The reversal of 40212664 is 46621204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40212661) 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, 7104 + ... + 11440.

Almost surely, 2^40212664 is an apocalyptic number.

It is an amenable number.

40212664 is an abundant number, since it is smaller than the sum of its proper divisors (40474136).

40212664 is a wasteful number, since it uses less digits than its factorization.

40212664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4423 (or 4419 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 40212664 is about 6341.3455985303. The cubic root of 40212664 is about 342.6002022694.

Adding to 40212664 its reverse (46621204), we get a palindrome (86833868).

The spelling of 40212664 in words is "forty million, two hundred twelve thousand, six hundred sixty-four".