939808881 has 24 divisors (see below), whose sum is σ = 1481890176. Its totient is φ = 569204640.

The previous prime is 939808823. The next prime is 939808931. The reversal of 939808881 is 188808939.

It is not a de Polignac number, because 939808881 - 2¹⁸ = 939546737 is a prime.

It is a super-2 number, since 2×939808881² = 1766481465612944322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (939808781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 249891 + ... + 253623.

It is an arithmetic number, because the mean of its divisors is an integer number (61745424).

Almost surely, 2^939808881 is an apocalyptic number.

It is an amenable number.

939808881 is a deficient number, since it is larger than the sum of its proper divisors (542081295).

939808881 is a wasteful number, since it uses less digits than its factorization.

939808881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6293 (or 6290 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The square root of 939808881 is about 30656.3024678450. The cubic root of 939808881 is about 979.5197150251.

The spelling of 939808881 in words is "nine hundred thirty-nine million, eight hundred eight thousand, eight hundred eighty-one".