38661687 has 12 divisors (see below), whose sum is σ = 57143944. Its totient is φ = 25174800.

The previous prime is 38661677. The next prime is 38661691. The reversal of 38661687 is 78616683.

It is not a de Polignac number, because 38661687 - 2⁴ = 38661671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38661607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49564 + ... + 50337.

Almost surely, 2^38661687 is an apocalyptic number.

38661687 is a deficient number, since it is larger than the sum of its proper divisors (18482257).

38661687 is a wasteful number, since it uses less digits than its factorization.

38661687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99950 (or 99947 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 38661687 is about 6217.8522819379. The cubic root of 38661687 is about 338.1377045895.

The spelling of 38661687 in words is "thirty-eight million, six hundred sixty-one thousand, six hundred eighty-seven".