38490807 has 4 divisors (see below), whose sum is σ = 51321080. Its totient is φ = 25660536.

The previous prime is 38490769. The next prime is 38490811. The reversal of 38490807 is 70809483.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 38490807 - 2¹⁹ = 37966519 is a prime.

It is a super-2 number, since 2×38490807² = 2963084447022498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38490847) 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, 6415132 + ... + 6415137.

It is an arithmetic number, because the mean of its divisors is an integer number (12830270).

Almost surely, 2^38490807 is an apocalyptic number.

38490807 is a deficient number, since it is larger than the sum of its proper divisors (12830273).

38490807 is a wasteful number, since it uses less digits than its factorization.

38490807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12830272.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 38490807 is about 6204.0959857178. The cubic root of 38490807 is about 337.6387928467.

The spelling of 38490807 in words is "thirty-eight million, four hundred ninety thousand, eight hundred seven".