27940420 has 12 divisors (see below), whose sum is σ = 58674924. Its totient is φ = 11176160.

The previous prime is 27940399. The next prime is 27940421. The reversal of 27940420 is 2404972.

It can be written as a sum of positive squares in 2 ways, for example, as 13439556 + 14500864 = 3666^2 + 3808^2 .

It is not an unprimeable number, because it can be changed into a prime (27940421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698491 + ... + 698530.

It is an arithmetic number, because the mean of its divisors is an integer number (4889577).

Almost surely, 2^27940420 is an apocalyptic number.

27940420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27940420 is an abundant number, since it is smaller than the sum of its proper divisors (30734504).

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

27940420 is a wasteful number, since it uses less digits than its factorization.

27940420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397030 (or 1397028 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 27940420 is about 5285.8698432708. The cubic root of 27940420 is about 303.4433633223.

The spelling of 27940420 in words is "twenty-seven million, nine hundred forty thousand, four hundred twenty".