38929631 has 4 divisors (see below), whose sum is σ = 41924232. Its totient is φ = 35935032.

The previous prime is 38929621. The next prime is 38929633. The reversal of 38929631 is 13692983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13692983 = 751 ⋅18233.

It is a cyclic number.

It is not a de Polignac number, because 38929631 - 2⁶ = 38929567 is a prime.

It is a super-2 number, since 2×38929631² = 3031032339592322, 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 (38929633) 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, 1497281 + ... + 1497306.

It is an arithmetic number, because the mean of its divisors is an integer number (10481058).

Almost surely, 2^38929631 is an apocalyptic number.

38929631 is a deficient number, since it is larger than the sum of its proper divisors (2994601).

38929631 is a wasteful number, since it uses less digits than its factorization.

38929631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2994600.

The product of its digits is 69984, while the sum is 41.

The square root of 38929631 is about 6239.3614256589. The cubic root of 38929631 is about 338.9170589779.

The spelling of 38929631 in words is "thirty-eight million, nine hundred twenty-nine thousand, six hundred thirty-one".