38977840 has 40 divisors (see below), whose sum is σ = 98864208. Its totient is φ = 14173440.

The previous prime is 38977837. The next prime is 38977849. The reversal of 38977840 is 4877983.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×38977840² = 3038544022131200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38977849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21267 + ... + 23026.

Almost surely, 2^38977840 is an apocalyptic number.

It is an amenable number.

38977840 is an abundant number, since it is smaller than the sum of its proper divisors (59886368).

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

38977840 is a wasteful number, since it uses less digits than its factorization.

38977840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44317 (or 44311 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 38977840 is about 6243.2235263524. The cubic root of 38977840 is about 339.0569020079.

The spelling of 38977840 in words is "thirty-eight million, nine hundred seventy-seven thousand, eight hundred forty".