38765644 has 12 divisors (see below), whose sum is σ = 71830584. Its totient is φ = 18242624.

The previous prime is 38765633. The next prime is 38765653. The reversal of 38765644 is 44656783.

It is a self number, because there is not a number n which added to its sum of digits gives 38765644.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284974 + ... + 285109.

It is an arithmetic number, because the mean of its divisors is an integer number (5985882).

Almost surely, 2^38765644 is an apocalyptic number.

38765644 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

38765644 is a deficient number, since it is larger than the sum of its proper divisors (33064940).

38765644 is a wasteful number, since it uses less digits than its factorization.

38765644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570104 (or 570102 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The square root of 38765644 is about 6226.2062285151. The cubic root of 38765644 is about 338.4405049813.

The spelling of 38765644 in words is "thirty-eight million, seven hundred sixty-five thousand, six hundred forty-four".