38731688 has 8 divisors (see below), whose sum is σ = 72621930. Its totient is φ = 19365840.

The previous prime is 38731687. The next prime is 38731697. The reversal of 38731688 is 88613783.

It can be written as a sum of positive squares in only one way, i.e., 25786084 + 12945604 = 5078^2 + 3598^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (38731687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2420723 + ... + 2420738.

Almost surely, 2^38731688 is an apocalyptic number.

It is an amenable number.

38731688 is a deficient number, since it is larger than the sum of its proper divisors (33890242).

38731688 is a wasteful number, since it uses less digits than its factorization.

38731688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4841467 (or 4841463 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 38731688 is about 6223.4787699485. The cubic root of 38731688 is about 338.3416593571.

The spelling of 38731688 in words is "thirty-eight million, seven hundred thirty-one thousand, six hundred eighty-eight".