27908821440 has 84 divisors (see below), whose sum is σ = 95994726984. Its totient is φ = 7442351616.

The previous prime is 27908821433. The next prime is 27908821487. The reversal of 27908821440 is 4412880972.

27908821440 is a `hidden beast` number, since 27 + 90 + 88 + 21 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4842402 + ... + 4848161.

Almost surely, 2^27908821440 is an apocalyptic number.

27908821440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27908821440 is an abundant number, since it is smaller than the sum of its proper divisors (68085905544).

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

27908821440 is a wasteful number, since it uses less digits than its factorization.

27908821440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9690586 (or 9690573 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 27908821440 in words is "twenty-seven billion, nine hundred eight million, eight hundred twenty-one thousand, four hundred forty".