27690228 has 24 divisors (see below), whose sum is σ = 71789760. Its totient is φ = 9230040.

The previous prime is 27690203. The next prime is 27690233. The reversal of 27690228 is 82209672.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 27690192 and 27690201.

It is a congruent number.

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, 128088 + ... + 128303.

It is an arithmetic number, because the mean of its divisors is an integer number (2991240).

Almost surely, 2^27690228 is an apocalyptic number.

It is an amenable number.

27690228 is an abundant number, since it is smaller than the sum of its proper divisors (44099532).

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

27690228 is a wasteful number, since it uses less digits than its factorization.

27690228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256404 (or 256396 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 27690228 is about 5262.1505109603. The cubic root of 27690228 is about 302.5349202680.

The spelling of 27690228 in words is "twenty-seven million, six hundred ninety thousand, two hundred twenty-eight".