27998590 has 64 divisors (see below), whose sum is σ = 57024000. Its totient is φ = 9846144.

The previous prime is 27998587. The next prime is 27998591. The reversal of 27998590 is 9589972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27998591) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187836 + ... + 187984.

It is an arithmetic number, because the mean of its divisors is an integer number (891000).

Almost surely, 2^27998590 is an apocalyptic number.

27998590 is an abundant number, since it is smaller than the sum of its proper divisors (29025410).

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

27998590 is a wasteful number, since it uses less digits than its factorization.

27998590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 27998590 is about 5291.3693879751. The cubic root of 27998590 is about 303.6537999705.

The spelling of 27998590 in words is "twenty-seven million, nine hundred ninety-eight thousand, five hundred ninety".