27904920 has 64 divisors (see below), whose sum is σ = 88128000. Its totient is φ = 7049088.

The previous prime is 27904879. The next prime is 27904927. The reversal of 27904920 is 2940972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27904927) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3840 + ... + 8399.

It is an arithmetic number, because the mean of its divisors is an integer number (1377000).

Almost surely, 2^27904920 is an apocalyptic number.

27904920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27904920 is an abundant number, since it is smaller than the sum of its proper divisors (60223080).

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

27904920 is a wasteful number, since it uses less digits than its factorization.

27904920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12272 (or 12268 counting only the distinct ones).

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

The square root of 27904920 is about 5282.5107666715. The cubic root of 27904920 is about 303.3147944499.

The spelling of 27904920 in words is "twenty-seven million, nine hundred four thousand, nine hundred twenty".