27788890 has 12 divisors (see below), whose sum is σ = 50050026. Its totient is φ = 11108888.

The previous prime is 27788881. The next prime is 27788923. The reversal of 27788890 is 9888772.

It can be written as a sum of positive squares in only one way, i.e., 25010001 + 2778889 = 5001^2 + 1667^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15837 + ... + 17503.

Almost surely, 2^27788890 is an apocalyptic number.

27788890 is a deficient number, since it is larger than the sum of its proper divisors (22261136).

27788890 is an frugal number, since it uses more digits than its factorization.

27788890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3341 (or 1674 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 49.

The square root of 27788890 is about 5271.5168595007. The cubic root of 27788890 is about 302.8938112504.

The spelling of 27788890 in words is "twenty-seven million, seven hundred eighty-eight thousand, eight hundred ninety".