38991080 has 32 divisors (see below), whose sum is σ = 90757800. Its totient is φ = 15058176.

The previous prime is 38991061. The next prime is 38991089. The reversal of 38991080 is 8019983.

38991080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 26894596 + 12096484 = 5186^2 + 3478^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (38991089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15647 + ... + 17966.

Almost surely, 2^38991080 is an apocalyptic number.

It is an amenable number.

38991080 is an abundant number, since it is smaller than the sum of its proper divisors (51766720).

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

38991080 is a wasteful number, since it uses less digits than its factorization.

38991080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33653 (or 33649 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 38991080 is about 6244.2837859918. The cubic root of 38991080 is about 339.0952879659.

The spelling of 38991080 in words is "thirty-eight million, nine hundred ninety-one thousand, eighty".