27491690 has 16 divisors (see below), whose sum is σ = 49876992. Its totient is φ = 10909584.

The previous prime is 27491687. The next prime is 27491701. The reversal of 27491690 is 9619472.

It is a super-2 number, since 2×27491690² = 1511586038112200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9554 + ... + 12093.

It is an arithmetic number, because the mean of its divisors is an integer number (3117312).

Almost surely, 2^27491690 is an apocalyptic number.

27491690 is a deficient number, since it is larger than the sum of its proper divisors (22385302).

27491690 is a wasteful number, since it uses less digits than its factorization.

27491690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21781.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 27491690 is about 5243.2518535733. The cubic root of 27491690 is about 301.8101302028.

The spelling of 27491690 in words is "twenty-seven million, four hundred ninety-one thousand, six hundred ninety".