27920020 has 12 divisors (see below), whose sum is σ = 58632084. Its totient is φ = 11168000.

The previous prime is 27920017. The next prime is 27920059. The reversal of 27920020 is 2002972.

It can be written as a sum of positive squares in 2 ways, for example, as 19820304 + 8099716 = 4452^2 + 2846^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27919973 and 27920000.

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, 697981 + ... + 698020.

It is an arithmetic number, because the mean of its divisors is an integer number (4886007).

Almost surely, 2^27920020 is an apocalyptic number.

27920020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27920020 is an abundant number, since it is smaller than the sum of its proper divisors (30712064).

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

27920020 is a wasteful number, since it uses less digits than its factorization.

27920020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396010 (or 1396008 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 27920020 is about 5283.9398179767. The cubic root of 27920020 is about 303.3694948100.

Adding to 27920020 its reverse (2002972), we get a palindrome (29922992).

The spelling of 27920020 in words is "twenty-seven million, nine hundred twenty thousand, twenty".