38857128 has 32 divisors (see below), whose sum is σ = 102256800. Its totient is φ = 12270528.

The previous prime is 38857123. The next prime is 38857139. The reversal of 38857128 is 82175883.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 38857128.

It is not an unprimeable number, because it can be changed into a prime (38857123) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 42151 + ... + 43062.

It is an arithmetic number, because the mean of its divisors is an integer number (3195525).

Almost surely, 2^38857128 is an apocalyptic number.

38857128 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

38857128 is an abundant number, since it is smaller than the sum of its proper divisors (63399672).

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

38857128 is a wasteful number, since it uses less digits than its factorization.

38857128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85241 (or 85237 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 38857128 is about 6233.5485880837. The cubic root of 38857128 is about 338.7065271936.

The spelling of 38857128 in words is "thirty-eight million, eight hundred fifty-seven thousand, one hundred twenty-eight".