27390920 has 16 divisors (see below), whose sum is σ = 61629660. Its totient is φ = 10956352.

The previous prime is 27390901. The next prime is 27390929. The reversal of 27390920 is 2909372.

It can be written as a sum of positive squares in 2 ways, for example, as 23833924 + 3556996 = 4882^2 + 1886^2 .

It is not an unprimeable number, because it can be changed into a prime (27390929) 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 3 ways as a sum of consecutive naturals, for example, 342347 + ... + 342426.

Almost surely, 2^27390920 is an apocalyptic number.

27390920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27390920 is an abundant number, since it is smaller than the sum of its proper divisors (34238740).

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

27390920 is a wasteful number, since it uses less digits than its factorization.

27390920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684784 (or 684780 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 27390920 is about 5233.6335370372. The cubic root of 27390920 is about 301.4409199372.

The spelling of 27390920 in words is "twenty-seven million, three hundred ninety thousand, nine hundred twenty".