38928731 has 8 divisors (see below), whose sum is σ = 39690240. Its totient is φ = 38170728.

The previous prime is 38928707. The next prime is 38928763. The reversal of 38928731 is 13782983.

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

It is a cyclic number.

It is not a de Polignac number, because 38928731 - 2⁶ = 38928667 is a prime.

It is a super-2 number, since 2×38928731² = 3030892194540722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38928781) 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, 35270 + ... + 36356.

It is an arithmetic number, because the mean of its divisors is an integer number (4961280).

Almost surely, 2^38928731 is an apocalyptic number.

38928731 is a deficient number, since it is larger than the sum of its proper divisors (761509).

38928731 is a wasteful number, since it uses less digits than its factorization.

38928731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753.

The product of its digits is 72576, while the sum is 41.

The square root of 38928731 is about 6239.2893024767. The cubic root of 38928731 is about 338.9144471910.

The spelling of 38928731 in words is "thirty-eight million, nine hundred twenty-eight thousand, seven hundred thirty-one".