27628220 has 12 divisors (see below), whose sum is σ = 58019304. Its totient is φ = 11051280.

The previous prime is 27628217. The next prime is 27628259. The reversal of 27628220 is 2282672.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690686 + ... + 690725.

It is an arithmetic number, because the mean of its divisors is an integer number (4834942).

Almost surely, 2^27628220 is an apocalyptic number.

27628220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27628220 is an abundant number, since it is smaller than the sum of its proper divisors (30391084).

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

27628220 is a wasteful number, since it uses less digits than its factorization.

27628220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381420 (or 1381418 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 27628220 is about 5256.2553210437. The cubic root of 27628220 is about 302.3089247068.

The spelling of 27628220 in words is "twenty-seven million, six hundred twenty-eight thousand, two hundred twenty".