40640564 has 6 divisors (see below), whose sum is σ = 71120994. Its totient is φ = 20320280.

The previous prime is 40640543. The next prime is 40640569. The reversal of 40640564 is 46504604.

It can be written as a sum of positive squares in only one way, i.e., 39816100 + 824464 = 6310^2 + 908^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40640569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5080067 + ... + 5080074.

It is an arithmetic number, because the mean of its divisors is an integer number (11853499).

Almost surely, 2^40640564 is an apocalyptic number.

It is an amenable number.

40640564 is a deficient number, since it is larger than the sum of its proper divisors (30480430).

40640564 is a wasteful number, since it uses less digits than its factorization.

40640564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10160145 (or 10160143 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 40640564 is about 6374.9952156845. The cubic root of 40640564 is about 343.8111118236.

The spelling of 40640564 in words is "forty million, six hundred forty thousand, five hundred sixty-four".