40640524 has 12 divisors (see below), whose sum is σ = 72634464. Its totient is φ = 19887824.

The previous prime is 40640521. The next prime is 40640527. The reversal of 40640524 is 42504604.

It is an interprime number because it is at equal distance from previous prime (40640521) and next prime (40640527).

It is not an unprimeable number, because it can be changed into a prime (40640521) 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, 107899 + ... + 108274.

It is an arithmetic number, because the mean of its divisors is an integer number (6052872).

Almost surely, 2^40640524 is an apocalyptic number.

It is an amenable number.

40640524 is a deficient number, since it is larger than the sum of its proper divisors (31993940).

40640524 is a wasteful number, since it uses less digits than its factorization.

40640524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216224 (or 216222 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 40640524 is about 6374.9920784265. The cubic root of 40640524 is about 343.8109990262.

The spelling of 40640524 in words is "forty million, six hundred forty thousand, five hundred twenty-four".