27738278480 has 80 divisors (see below), whose sum is σ = 74492892864. Its totient is φ = 9493309440.

The previous prime is 27738278479. The next prime is 27738278597. The reversal of 27738278480 is 8487283772.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×27738278480² (a number of 22 digits) contains 22 as substring.

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, 912122 + ... + 942041.

Almost surely, 2^27738278480 is an apocalyptic number.

27738278480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27738278480 is an abundant number, since it is smaller than the sum of its proper divisors (46754614384).

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

27738278480 is a wasteful number, since it uses less digits than its factorization.

27738278480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854204 (or 1854198 counting only the distinct ones).

The product of its (nonzero) digits is 8429568, while the sum is 56.

The spelling of 27738278480 in words is "twenty-seven billion, seven hundred thirty-eight million, two hundred seventy-eight thousand, four hundred eighty".