38691880 has 16 divisors (see below), whose sum is σ = 87056820. Its totient is φ = 15476736.

The previous prime is 38691871. The next prime is 38691883. The reversal of 38691880 is 8819683.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38415204 + 276676 = 6198^2 + 526^2 .

It is not an unprimeable number, because it can be changed into a prime (38691883) 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, 483609 + ... + 483688.

Almost surely, 2^38691880 is an apocalyptic number.

It is an amenable number.

38691880 is an abundant number, since it is smaller than the sum of its proper divisors (48364940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38691880 is a wasteful number, since it uses less digits than its factorization.

38691880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967308 (or 967304 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 38691880 is about 6220.2797364749. The cubic root of 38691880 is about 338.2257050189.

The spelling of 38691880 in words is "thirty-eight million, six hundred ninety-one thousand, eight hundred eighty".