38957920 has 24 divisors (see below), whose sum is σ = 92038464. Its totient is φ = 15583104.

The previous prime is 38957909. The next prime is 38957969. The reversal of 38957920 is 2975983.

It is a happy number.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121584 + ... + 121903.

It is an arithmetic number, because the mean of its divisors is an integer number (3834936).

Almost surely, 2^38957920 is an apocalyptic number.

It is an amenable number.

38957920 is an abundant number, since it is smaller than the sum of its proper divisors (53080544).

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

38957920 is a wasteful number, since it uses less digits than its factorization.

38957920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243502 (or 243494 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 38957920 is about 6241.6279927596. The cubic root of 38957920 is about 338.9991327353. Note that the first 3 decimals are identical.

The spelling of 38957920 in words is "thirty-eight million, nine hundred fifty-seven thousand, nine hundred twenty".