27990143980 has 96 divisors (see below), whose sum is σ = 61399296000. Its totient is φ = 10711384320.

The previous prime is 27990143903. The next prime is 27990144031. The reversal of 27990143980 is 8934109972.

It is a happy number.

It is a super-2 number, since 2×27990143980² (a number of 22 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 6616506 + ... + 6620734.

It is an arithmetic number, because the mean of its divisors is an integer number (639576000).

Almost surely, 2^27990143980 is an apocalyptic number.

27990143980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27990143980 is an abundant number, since it is smaller than the sum of its proper divisors (33409152020).

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

27990143980 is a wasteful number, since it uses less digits than its factorization.

27990143980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4447 (or 4445 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 27990143980 in words is "twenty-seven billion, nine hundred ninety million, one hundred forty-three thousand, nine hundred eighty".