38631793 has 4 divisors (see below), whose sum is σ = 39014388. Its totient is φ = 38249200.

The previous prime is 38631781. The next prime is 38631809. The reversal of 38631793 is 39713683.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36578304 + 2053489 = 6048^2 + 1433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38631793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38631763) 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, 191146 + ... + 191347.

It is an arithmetic number, because the mean of its divisors is an integer number (9753597).

Almost surely, 2^38631793 is an apocalyptic number.

It is an amenable number.

38631793 is a deficient number, since it is larger than the sum of its proper divisors (382595).

38631793 is a wasteful number, since it uses less digits than its factorization.

38631793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382594.

The product of its digits is 81648, while the sum is 40.

The square root of 38631793 is about 6215.4479323698. The cubic root of 38631793 is about 338.0505304751.

The spelling of 38631793 in words is "thirty-eight million, six hundred thirty-one thousand, seven hundred ninety-three".