28078957588 has 24 divisors (see below), whose sum is σ = 53611346880. Its totient is φ = 12761718720.

The previous prime is 28078957561. The next prime is 28078957591. The reversal of 28078957588 is 88575987082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422833 + ... + 484711.

It is an arithmetic number, because the mean of its divisors is an integer number (2233806120).

Almost surely, 2^28078957588 is an apocalyptic number.

It is an amenable number.

28078957588 is a deficient number, since it is larger than the sum of its proper divisors (25532389292).

28078957588 is a wasteful number, since it uses less digits than its factorization.

28078957588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72207 (or 72205 counting only the distinct ones).

The product of its (nonzero) digits is 90316800, while the sum is 67.

The spelling of 28078957588 in words is "twenty-eight billion, seventy-eight million, nine hundred fifty-seven thousand, five hundred eighty-eight".