27939457 has 24 divisors (see below), whose sum is σ = 36542016. Its totient is φ = 21133728.

The previous prime is 27939433. The next prime is 27939473. The reversal of 27939457 is 75493972.

It is not a de Polignac number, because 27939457 - 2²³ = 19550849 is a prime.

It is a super-2 number, since 2×27939457² = 1561226514909698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27939487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13698 + ... + 15604.

It is an arithmetic number, because the mean of its divisors is an integer number (1522584).

Almost surely, 2^27939457 is an apocalyptic number.

It is an amenable number.

27939457 is a deficient number, since it is larger than the sum of its proper divisors (8602559).

27939457 is a wasteful number, since it uses less digits than its factorization.

27939457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957 (or 1950 counting only the distinct ones).

The product of its digits is 476280, while the sum is 46.

The square root of 27939457 is about 5285.7787505721. The cubic root of 27939457 is about 303.4398771028.

The spelling of 27939457 in words is "twenty-seven million, nine hundred thirty-nine thousand, four hundred fifty-seven".