27940900 has 36 divisors (see below), whose sum is σ = 65298772. Its totient is φ = 10316160.

The previous prime is 27940897. The next prime is 27940901. The reversal of 27940900 is 904972.

It can be written as a sum of positive squares in 6 ways, for example, as 8386816 + 19554084 = 2896^2 + 4422^2 .

It is not an unprimeable number, because it can be changed into a prime (27940901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9447 + ... + 12046.

Almost surely, 2^27940900 is an apocalyptic number.

27940900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27940900 is an abundant number, since it is smaller than the sum of its proper divisors (37357872).

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

27940900 is a wasteful number, since it uses less digits than its factorization.

27940900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21520 (or 21513 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 27940900 is about 5285.9152471450. The cubic root of 27940900 is about 303.4451009719.

The spelling of 27940900 in words is "twenty-seven million, nine hundred forty thousand, nine hundred".