27587979420 has 96 divisors (see below), whose sum is σ = 79860264960. Its totient is φ = 7108577280.

The previous prime is 27587979413. The next prime is 27587979437. The reversal of 27587979420 is 2497978572.

It is a super-2 number, since 2×27587979420² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1240761 + ... + 1262799.

It is an arithmetic number, because the mean of its divisors is an integer number (831877760).

Almost surely, 2^27587979420 is an apocalyptic number.

27587979420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27587979420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39930132480).

27587979420 is an abundant number, since it is smaller than the sum of its proper divisors (52272285540).

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

27587979420 is a wasteful number, since it uses less digits than its factorization.

27587979420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22755 (or 22753 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 60.

The spelling of 27587979420 in words is "twenty-seven billion, five hundred eighty-seven million, nine hundred seventy-nine thousand, four hundred twenty".