27679220 has 12 divisors (see below), whose sum is σ = 58126404. Its totient is φ = 11071680.

The previous prime is 27679207. The next prime is 27679231. The reversal of 27679220 is 2297672.

It can be written as a sum of positive squares in 2 ways, for example, as 14531344 + 13147876 = 3812^2 + 3626^2 .

It is a super-2 number, since 2×27679220² = 1532278439616800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691961 + ... + 692000.

It is an arithmetic number, because the mean of its divisors is an integer number (4843867).

Almost surely, 2^27679220 is an apocalyptic number.

27679220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27679220 is an abundant number, since it is smaller than the sum of its proper divisors (30447184).

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

27679220 is a wasteful number, since it uses less digits than its factorization.

27679220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383970 (or 1383968 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 27679220 is about 5261.1044467868. The cubic root of 27679220 is about 302.4948249462.

The spelling of 27679220 in words is "twenty-seven million, six hundred seventy-nine thousand, two hundred twenty".