27990143979 has 8 divisors (see below), whose sum is σ = 42651648000. Its totient is φ = 15994367976.

The previous prime is 27990143903. The next prime is 27990144031. The reversal of 27990143979 is 97934109972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27990143979 - 2⁸ = 27990143723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27990141979) 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, 666431979 + ... + 666432020.

It is an arithmetic number, because the mean of its divisors is an integer number (5331456000).

Almost surely, 2^27990143979 is an apocalyptic number.

27990143979 is a deficient number, since it is larger than the sum of its proper divisors (14661504021).

27990143979 is a wasteful number, since it uses less digits than its factorization.

27990143979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332864009.

The product of its (nonzero) digits is 7715736, while the sum is 60.

The spelling of 27990143979 in words is "twenty-seven billion, nine hundred ninety million, one hundred forty-three thousand, nine hundred seventy-nine".