38818720 has 24 divisors (see below), whose sum is σ = 91709604. Its totient is φ = 15527424.

The previous prime is 38818711. The next prime is 38818739. The reversal of 38818720 is 2781883.

It can be written as a sum of positive squares in 2 ways, for example, as 33039504 + 5779216 = 5748^2 + 2404^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 38818720.

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, 121149 + ... + 121468.

Almost surely, 2^38818720 is an apocalyptic number.

It is an amenable number.

38818720 is an abundant number, since it is smaller than the sum of its proper divisors (52890884).

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

38818720 is a wasteful number, since it uses less digits than its factorization.

38818720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242632 (or 242624 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 38818720 is about 6230.4670771941. The cubic root of 38818720 is about 338.5948932022.

The spelling of 38818720 in words is "thirty-eight million, eight hundred eighteen thousand, seven hundred twenty".