38644572 has 12 divisors (see below), whose sum is σ = 90170696. Its totient is φ = 12881520.

The previous prime is 38644517. The next prime is 38644597. The reversal of 38644572 is 27544683.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 38644572.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610179 + ... + 1610202.

Almost surely, 2^38644572 is an apocalyptic number.

It is an amenable number.

38644572 is an abundant number, since it is smaller than the sum of its proper divisors (51526124).

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

38644572 is a wasteful number, since it uses less digits than its factorization.

38644572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220388 (or 3220386 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The square root of 38644572 is about 6216.4758505121. The cubic root of 38644572 is about 338.0878009127.

The spelling of 38644572 in words is "thirty-eight million, six hundred forty-four thousand, five hundred seventy-two".