38651631 has 8 divisors (see below), whose sum is σ = 51566640. Its totient is φ = 25752192.

The previous prime is 38651617. The next prime is 38651647. The reversal of 38651631 is 13615683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38651631 - 2²² = 34457327 is a prime.

It is a super-2 number, since 2×38651631² = 2987897157920322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 38651592 and 38651601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38651611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4471 + ... + 9863.

It is an arithmetic number, because the mean of its divisors is an integer number (6445830).

Almost surely, 2^38651631 is an apocalyptic number.

38651631 is a deficient number, since it is larger than the sum of its proper divisors (12915009).

38651631 is a wasteful number, since it uses less digits than its factorization.

38651631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7785.

The product of its digits is 12960, while the sum is 33.

The square root of 38651631 is about 6217.0435900032. The cubic root of 38651631 is about 338.1083852308.

The spelling of 38651631 in words is "thirty-eight million, six hundred fifty-one thousand, six hundred thirty-one".