27880359408 has 100 divisors (see below), whose sum is σ = 88029698328. Its totient is φ = 8448589440.

The previous prime is 27880359391. The next prime is 27880359427. The reversal of 27880359408 is 80495308872.

It is a happy number.

It is a super-2 number, since 2×27880359408² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 963591 + ... + 992102.

Almost surely, 2^27880359408 is an apocalyptic number.

It is an amenable number.

27880359408 is an abundant number, since it is smaller than the sum of its proper divisors (60149338920).

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

27880359408 is a wasteful number, since it uses less digits than its factorization.

27880359408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955724 (or 1955709 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 27880359408 in words is "twenty-seven billion, eight hundred eighty million, three hundred fifty-nine thousand, four hundred eight".