38973631 has 4 divisors (see below), whose sum is σ = 38987200. Its totient is φ = 38960064.

The previous prime is 38973629. The next prime is 38973637. The reversal of 38973631 is 13637983.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 38973631 - 2¹ = 38973629 is a prime.

It is a super-2 number, since 2×38973631² = 3037887826648322, 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 (38973637) 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, 591 + ... + 8848.

It is an arithmetic number, because the mean of its divisors is an integer number (9746800).

Almost surely, 2^38973631 is an apocalyptic number.

38973631 is a deficient number, since it is larger than the sum of its proper divisors (13569).

38973631 is an equidigital number, since it uses as much as digits as its factorization.

38973631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13568.

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

The square root of 38973631 is about 6242.8864317718. The cubic root of 38973631 is about 339.0446972793.

The spelling of 38973631 in words is "thirty-eight million, nine hundred seventy-three thousand, six hundred thirty-one".