28088080657 has 8 divisors (see below), whose sum is σ = 34569945536. Its totient is φ = 22223536272.

The previous prime is 28088080651. The next prime is 28088080681. The reversal of 28088080657 is 75608088082.

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

It is not a de Polignac number, because 28088080657 - 2³ = 28088080649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28088080651) 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, 154330023 + ... + 154330204.

It is an arithmetic number, because the mean of its divisors is an integer number (4321243192).

Almost surely, 2^28088080657 is an apocalyptic number.

It is an amenable number.

28088080657 is a deficient number, since it is larger than the sum of its proper divisors (6481864879).

28088080657 is a wasteful number, since it uses less digits than its factorization.

28088080657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308660247.

The product of its (nonzero) digits is 1720320, while the sum is 52.

The spelling of 28088080657 in words is "twenty-eight billion, eighty-eight million, eighty thousand, six hundred fifty-seven".