38908513 has 4 divisors (see below), whose sum is σ = 44466880. Its totient is φ = 33350148.

The previous prime is 38908501. The next prime is 38908567. The reversal of 38908513 is 31580983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38908513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38905513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2779173 + ... + 2779186.

It is an arithmetic number, because the mean of its divisors is an integer number (11116720).

Almost surely, 2^38908513 is an apocalyptic number.

It is an amenable number.

38908513 is a deficient number, since it is larger than the sum of its proper divisors (5558367).

38908513 is an equidigital number, since it uses as much as digits as its factorization.

38908513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5558366.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 38908513 is about 6237.6688754694. The cubic root of 38908513 is about 338.8557642362.

It can be divided in two parts, 3890 and 8513, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 38908513 in words is "thirty-eight million, nine hundred eight thousand, five hundred thirteen".