38740720 has 20 divisors (see below), whose sum is σ = 90072360. Its totient is φ = 15496256.

The previous prime is 38740703. The next prime is 38740727. The reversal of 38740720 is 2704783.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×38740720² = 3001686772236800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38740727) 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, 242050 + ... + 242209.

It is an arithmetic number, because the mean of its divisors is an integer number (4503618).

Almost surely, 2^38740720 is an apocalyptic number.

It is an amenable number.

38740720 is an abundant number, since it is smaller than the sum of its proper divisors (51331640).

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

38740720 is a wasteful number, since it uses less digits than its factorization.

38740720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484272 (or 484266 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 38740720 is about 6224.2043668247. The cubic root of 38740720 is about 338.3679570693.

The spelling of 38740720 in words is "thirty-eight million, seven hundred forty thousand, seven hundred twenty".