27730238536 has 128 divisors (see below), whose sum is σ = 69890688000. Its totient is φ = 9961447680.

The previous prime is 27730238531. The next prime is 27730238573. The reversal of 27730238536 is 63583203772.

It is a super-2 number, since 2×27730238536² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27730238531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10272915 + ... + 10275613.

It is an arithmetic number, because the mean of its divisors is an integer number (546021000).

Almost surely, 2^27730238536 is an apocalyptic number.

27730238536 is a gapful number since it is divisible by the number (26) 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 27730238536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34945344000).

27730238536 is an abundant number, since it is smaller than the sum of its proper divisors (42160449464).

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

27730238536 is a wasteful number, since it uses less digits than its factorization.

27730238536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4019 (or 4015 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 46.

The spelling of 27730238536 in words is "twenty-seven billion, seven hundred thirty million, two hundred thirty-eight thousand, five hundred thirty-six".