38775820 has 12 divisors (see below), whose sum is σ = 81429264. Its totient is φ = 15510320.

The previous prime is 38775817. The next prime is 38775829. The reversal of 38775820 is 2857783.

It is not an unprimeable number, because it can be changed into a prime (38775829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969376 + ... + 969415.

It is an arithmetic number, because the mean of its divisors is an integer number (6785772).

Almost surely, 2^38775820 is an apocalyptic number.

It is an amenable number.

38775820 is an abundant number, since it is smaller than the sum of its proper divisors (42653444).

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

38775820 is a wasteful number, since it uses less digits than its factorization.

38775820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938800 (or 1938798 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 38775820 is about 6227.0233659430. The cubic root of 38775820 is about 338.4701159884.

The spelling of 38775820 in words is "thirty-eight million, seven hundred seventy-five thousand, eight hundred twenty".