38128644 has 36 divisors (see below), whose sum is σ = 99952944. Its totient is φ = 12709224.

The previous prime is 38128627. The next prime is 38128669. The reversal of 38128644 is 44682183.

38128644 is a `hidden beast` number, since 3 + 8 + 1 + 2 + 8 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 38128599 and 38128608.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18642 + ... + 20585.

Almost surely, 2^38128644 is an apocalyptic number.

It is an amenable number.

38128644 is an abundant number, since it is smaller than the sum of its proper divisors (61824300).

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

38128644 is a wasteful number, since it uses less digits than its factorization.

38128644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39246 (or 39232 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 38128644 is about 6174.8395930583. The cubic root of 38128644 is about 336.5764975440.

The spelling of 38128644 in words is "thirty-eight million, one hundred twenty-eight thousand, six hundred forty-four".