38666720 has 24 divisors (see below), whose sum is σ = 91350504. Its totient is φ = 15466624.

The previous prime is 38666701. The next prime is 38666723. The reversal of 38666720 is 2766683.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38666723) 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, 120674 + ... + 120993.

It is an arithmetic number, because the mean of its divisors is an integer number (3806271).

Almost surely, 2^38666720 is an apocalyptic number.

It is an amenable number.

38666720 is an abundant number, since it is smaller than the sum of its proper divisors (52683784).

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

38666720 is a wasteful number, since it uses less digits than its factorization.

38666720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241682 (or 241674 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 38666720 is about 6218.2569905079. The cubic root of 38666720 is about 338.1523769379.

The spelling of 38666720 in words is "thirty-eight million, six hundred sixty-six thousand, seven hundred twenty".