38866431 has 4 divisors (see below), whose sum is σ = 51821912. Its totient is φ = 25910952.

The previous prime is 38866397. The next prime is 38866433. The reversal of 38866431 is 13466883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13466883 = 3 ⋅4488961.

It is not a de Polignac number, because 38866431 - 2¹⁴ = 38850047 is a prime.

It is a super-2 number, since 2×38866431² = 3021198917355522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38866431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38866433) 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, 6477736 + ... + 6477741.

It is an arithmetic number, because the mean of its divisors is an integer number (12955478).

Almost surely, 2^38866431 is an apocalyptic number.

38866431 is a deficient number, since it is larger than the sum of its proper divisors (12955481).

38866431 is a wasteful number, since it uses less digits than its factorization.

38866431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12955480.

The product of its digits is 82944, while the sum is 39.

The square root of 38866431 is about 6234.2947476038. The cubic root of 38866431 is about 338.7335555712.

The spelling of 38866431 in words is "thirty-eight million, eight hundred sixty-six thousand, four hundred thirty-one".