38977820 has 24 divisors (see below), whose sum is σ = 93547104. Its totient is φ = 13363776.

The previous prime is 38977789. The next prime is 38977837. The reversal of 38977820 is 2877983.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139067 + ... + 139346.

It is an arithmetic number, because the mean of its divisors is an integer number (3897796).

Almost surely, 2^38977820 is an apocalyptic number.

It is an amenable number.

38977820 is an abundant number, since it is smaller than the sum of its proper divisors (54569284).

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

38977820 is a wasteful number, since it uses less digits than its factorization.

38977820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278429 (or 278427 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 38977820 is about 6243.2219246155. The cubic root of 38977820 is about 339.0568440164.

The spelling of 38977820 in words is "thirty-eight million, nine hundred seventy-seven thousand, eight hundred twenty".