27897690 has 32 divisors (see below), whose sum is σ = 67190976. Its totient is φ = 7413120.

The previous prime is 27897677. The next prime is 27897691. The reversal of 27897690 is 9679872.

It is a super-2 number, since 2×27897690² = 1556562214672200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27897691) 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, 7905 + ... + 10875.

It is an arithmetic number, because the mean of its divisors is an integer number (2099718).

Almost surely, 2^27897690 is an apocalyptic number.

27897690 is an abundant number, since it is smaller than the sum of its proper divisors (39293286).

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

27897690 is a wasteful number, since it uses less digits than its factorization.

27897690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 27897690 is about 5281.8263886652. The cubic root of 27897690 is about 303.2885964965.

The spelling of 27897690 in words is "twenty-seven million, eight hundred ninety-seven thousand, six hundred ninety".