27771828438 has 16 divisors (see below), whose sum is σ = 56304529776. Its totient is φ = 9130464000.

The previous prime is 27771828431. The next prime is 27771828457. The reversal of 27771828438 is 83482817772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27771828431) 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, 31702563 + ... + 31703438.

It is an arithmetic number, because the mean of its divisors is an integer number (3519033111).

Almost surely, 2^27771828438 is an apocalyptic number.

27771828438 is an abundant number, since it is smaller than the sum of its proper divisors (28532701338).

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

27771828438 is a wasteful number, since it uses less digits than its factorization.

27771828438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63406079.

The product of its digits is 8429568, while the sum is 57.

The spelling of 27771828438 in words is "twenty-seven billion, seven hundred seventy-one million, eight hundred twenty-eight thousand, four hundred thirty-eight".