28156578352 has 60 divisors (see below), whose sum is σ = 63481242000. Its totient is φ = 12063074688.

The previous prime is 28156578347. The next prime is 28156578367. The reversal of 28156578352 is 25387565182.

It is a self number, because there is not a number n which added to its sum of digits gives 28156578352.

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, 4504093 + ... + 4510339.

It is an arithmetic number, because the mean of its divisors is an integer number (1058020700).

Almost surely, 2^28156578352 is an apocalyptic number.

It is an amenable number.

28156578352 is an abundant number, since it is smaller than the sum of its proper divisors (35324663648).

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

28156578352 is a wasteful number, since it uses less digits than its factorization.

28156578352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12018 (or 12005 counting only the distinct ones).

The product of its digits is 4032000, while the sum is 52.

The spelling of 28156578352 in words is "twenty-eight billion, one hundred fifty-six million, five hundred seventy-eight thousand, three hundred fifty-two".