27923800820 has 12 divisors (see below), whose sum is σ = 58639981764. Its totient is φ = 11169520320.

The previous prime is 27923800727. The next prime is 27923800867. The reversal of 27923800820 is 2800832972.

It can be written as a sum of positive squares in 2 ways, for example, as 12913140496 + 15010660324 = 113636^2 + 122518^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 698095001 + ... + 698095040.

It is an arithmetic number, because the mean of its divisors is an integer number (4886665147).

Almost surely, 2^27923800820 is an apocalyptic number.

27923800820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27923800820 is an abundant number, since it is smaller than the sum of its proper divisors (30716180944).

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

27923800820 is a wasteful number, since it uses less digits than its factorization.

27923800820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396190050 (or 1396190048 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 27923800820 in words is "twenty-seven billion, nine hundred twenty-three million, eight hundred thousand, eight hundred twenty".