27031989 has 16 divisors (see below), whose sum is σ = 38283840. Its totient is φ = 16907520.

The previous prime is 27031987. The next prime is 27032011. The reversal of 27031989 is 98913072.

It is not a de Polignac number, because 27031989 - 2¹ = 27031987 is a prime.

It is a super-2 number, since 2×27031989² = 1461456858592242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27031987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20842 + ... + 22100.

It is an arithmetic number, because the mean of its divisors is an integer number (2392740).

Almost surely, 2^27031989 is an apocalyptic number.

It is an amenable number.

27031989 is a deficient number, since it is larger than the sum of its proper divisors (11251851).

27031989 is a wasteful number, since it uses less digits than its factorization.

27031989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 27031989 is about 5199.2296544777. The cubic root of 27031989 is about 300.1184310186.

The spelling of 27031989 in words is "twenty-seven million, thirty-one thousand, nine hundred eighty-nine".