40513808 has 10 divisors (see below), whose sum is σ = 78495534. Its totient is φ = 20256896.

The previous prime is 40513801. The next prime is 40513829. The reversal of 40513808 is 80831504.

It can be written as a sum of positive squares in only one way, i.e., 37797904 + 2715904 = 6148^2 + 1648^2 .

It is not an unprimeable number, because it can be changed into a prime (40513801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1266041 + ... + 1266072.

Almost surely, 2^40513808 is an apocalyptic number.

It is an amenable number.

40513808 is a deficient number, since it is larger than the sum of its proper divisors (37981726).

40513808 is a wasteful number, since it uses less digits than its factorization.

40513808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532121 (or 2532115 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 40513808 is about 6365.0457971644. The cubic root of 40513808 is about 343.4532960210.

The spelling of 40513808 in words is "forty million, five hundred thirteen thousand, eight hundred eight".