27813930 has 32 divisors (see below), whose sum is σ = 66979008. Its totient is φ = 7392000.

The previous prime is 27813917. The next prime is 27813931. The reversal of 27813930 is 3931872.

It is a super-2 number, since 2×27813930² = 1547229404089800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27813891 and 27813900.

It is not an unprimeable number, because it can be changed into a prime (27813931) 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, 8530 + ... + 11330.

It is an arithmetic number, because the mean of its divisors is an integer number (2093094).

Almost surely, 2^27813930 is an apocalyptic number.

27813930 is an abundant number, since it is smaller than the sum of its proper divisors (39165078).

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

27813930 is a wasteful number, since it uses less digits than its factorization.

27813930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 27813930 is about 5273.8913526921. The cubic root of 27813930 is about 302.9847610761.

The spelling of 27813930 in words is "twenty-seven million, eight hundred thirteen thousand, nine hundred thirty".