38317820 has 12 divisors (see below), whose sum is σ = 80467464. Its totient is φ = 15327120.

The previous prime is 38317819. The next prime is 38317823. The reversal of 38317820 is 2871383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38317823) 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, 957926 + ... + 957965.

It is an arithmetic number, because the mean of its divisors is an integer number (6705622).

Almost surely, 2^38317820 is an apocalyptic number.

It is an amenable number.

38317820 is an abundant number, since it is smaller than the sum of its proper divisors (42149644).

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

38317820 is a wasteful number, since it uses less digits than its factorization.

38317820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915900 (or 1915898 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 38317820 is about 6190.1389322050. The cubic root of 38317820 is about 337.1322230610.

The spelling of 38317820 in words is "thirty-eight million, three hundred seventeen thousand, eight hundred twenty".