27939870 has 64 divisors (see below), whose sum is σ = 85155840. Its totient is φ = 6385824.

The previous prime is 27939869. The next prime is 27939881. The reversal of 27939870 is 7893972.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5502 + ... + 9281.

It is an arithmetic number, because the mean of its divisors is an integer number (1330560).

Almost surely, 2^27939870 is an apocalyptic number.

27939870 is an abundant number, since it is smaller than the sum of its proper divisors (57215970).

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

27939870 is a wasteful number, since it uses less digits than its factorization.

27939870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14806 (or 14800 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 27939870 is about 5285.8178175189. The cubic root of 27939870 is about 303.4413722410.

The spelling of 27939870 in words is "twenty-seven million, nine hundred thirty-nine thousand, eight hundred seventy".