27859459720 has 32 divisors (see below), whose sum is σ = 62703535320. Its totient is φ = 11140272640.

The previous prime is 27859459717. The next prime is 27859459721. The reversal of 27859459720 is 2795495872.

It can be written as a sum of positive squares in 4 ways, for example, as 22591893636 + 5267566084 = 150306^2 + 72578^2 .

It is a super-2 number, since 2×27859459720² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27859459721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20724 + ... + 236956.

Almost surely, 2^27859459720 is an apocalyptic number.

27859459720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27859459720 is an abundant number, since it is smaller than the sum of its proper divisors (34844075600).

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

27859459720 is a wasteful number, since it uses less digits than its factorization.

27859459720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219465 (or 219461 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 27859459720 in words is "twenty-seven billion, eight hundred fifty-nine million, four hundred fifty-nine thousand, seven hundred twenty".