38771920 has 40 divisors (see below), whose sum is σ = 98341920. Its totient is φ = 14098560.

The previous prime is 38771911. The next prime is 38771921. The reversal of 38771920 is 2917783.

38771920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

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 38771920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38771921) 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, 21150 + ... + 22909.

It is an arithmetic number, because the mean of its divisors is an integer number (2458548).

Almost surely, 2^38771920 is an apocalyptic number.

It is an amenable number.

38771920 is an abundant number, since it is smaller than the sum of its proper divisors (59570000).

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

38771920 is a wasteful number, since it uses less digits than its factorization.

38771920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44083 (or 44077 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 38771920 is about 6226.7102068428. The cubic root of 38771920 is about 338.4587680426.

The spelling of 38771920 in words is "thirty-eight million, seven hundred seventy-one thousand, nine hundred twenty".