38644385 has 48 divisors (see below), whose sum is σ = 55339200. Its totient is φ = 25788672.

The previous prime is 38644381. The next prime is 38644399. The reversal of 38644385 is 58344683.

It is a happy number.

It is not a de Polignac number, because 38644385 - 2² = 38644381 is a prime.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38644381) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 465554 + ... + 465636.

It is an arithmetic number, because the mean of its divisors is an integer number (1152900).

Almost surely, 2^38644385 is an apocalyptic number.

It is an amenable number.

38644385 is a deficient number, since it is larger than the sum of its proper divisors (16694815).

38644385 is a wasteful number, since it uses less digits than its factorization.

38644385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 149 counting only the distinct ones).

The product of its digits is 276480, while the sum is 41.

The square root of 38644385 is about 6216.4608098178. The cubic root of 38644385 is about 338.0872555793.

The spelling of 38644385 in words is "thirty-eight million, six hundred forty-four thousand, three hundred eighty-five".