40613728 has 12 divisors (see below), whose sum is σ = 79958340. Its totient is φ = 20306848.

The previous prime is 40613719. The next prime is 40613743. The reversal of 40613728 is 82731604.

It is a self number, because there is not a number n which added to its sum of digits gives 40613728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634558 + ... + 634621.

It is an arithmetic number, because the mean of its divisors is an integer number (6663195).

Almost surely, 2^40613728 is an apocalyptic number.

It is an amenable number.

40613728 is a deficient number, since it is larger than the sum of its proper divisors (39344612).

40613728 is a wasteful number, since it uses less digits than its factorization.

40613728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269189 (or 1269181 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 40613728 is about 6372.8900822154. The cubic root of 40613728 is about 343.7354194146.

The spelling of 40613728 in words is "forty million, six hundred thirteen thousand, seven hundred twenty-eight".