27905899420 has 48 divisors (see below), whose sum is σ = 66988067328. Its totient is φ = 9565750080.

The previous prime is 27905899409. The next prime is 27905899451. The reversal of 27905899420 is 2499850972.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 760905 + ... + 796735.

It is an arithmetic number, because the mean of its divisors is an integer number (1395584736).

Almost surely, 2^27905899420 is an apocalyptic number.

27905899420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27905899420 is an abundant number, since it is smaller than the sum of its proper divisors (39082167908).

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

27905899420 is a wasteful number, since it uses less digits than its factorization.

27905899420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41410 (or 41408 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 27905899420 in words is "twenty-seven billion, nine hundred five million, eight hundred ninety-nine thousand, four hundred twenty".