27900920 has 16 divisors (see below), whose sum is σ = 62777160. Its totient is φ = 11160352.

The previous prime is 27900889. The next prime is 27900953. The reversal of 27900920 is 2900972.

It is a happy number.

It is a super-3 number, since 3×27900920³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 348722 + ... + 348801.

Almost surely, 2^27900920 is an apocalyptic number.

27900920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27900920 is an abundant number, since it is smaller than the sum of its proper divisors (34876240).

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

27900920 is a wasteful number, since it uses less digits than its factorization.

27900920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697534 (or 697530 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 27900920 is about 5282.1321452610. The cubic root of 27900920 is about 303.3003009824.

The spelling of 27900920 in words is "twenty-seven million, nine hundred thousand, nine hundred twenty".