27139788 has 36 divisors (see below), whose sum is σ = 73881808. Its totient is φ = 8350560.

The previous prime is 27139781. The next prime is 27139799. The reversal of 27139788 is 88793172.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (27139781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28528 + ... + 29463.

Almost surely, 2^27139788 is an apocalyptic number.

It is an amenable number.

27139788 is an abundant number, since it is smaller than the sum of its proper divisors (46742020).

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

27139788 is a wasteful number, since it uses less digits than its factorization.

27139788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58014 (or 58009 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 27139788 is about 5209.5861639865. The cubic root of 27139788 is about 300.5168424018.

The spelling of 27139788 in words is "twenty-seven million, one hundred thirty-nine thousand, seven hundred eighty-eight".