38407631 has 4 divisors (see below), whose sum is σ = 40077552. Its totient is φ = 36737712.

The previous prime is 38407627. The next prime is 38407639. The reversal of 38407631 is 13670483.

38407631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13670483 = 151 ⋅90533.

It is a cyclic number.

It is not a de Polignac number, because 38407631 - 2² = 38407627 is a prime.

It is a super-2 number, since 2×38407631² = 2950292238064322, 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 (38407639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834926 + ... + 834971.

It is an arithmetic number, because the mean of its divisors is an integer number (10019388).

Almost surely, 2^38407631 is an apocalyptic number.

38407631 is a deficient number, since it is larger than the sum of its proper divisors (1669921).

38407631 is a wasteful number, since it uses less digits than its factorization.

38407631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669920.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 38407631 is about 6197.3890470100. The cubic root of 38407631 is about 337.3954126775.

The spelling of 38407631 in words is "thirty-eight million, four hundred seven thousand, six hundred thirty-one".