28156402650 has 48 divisors (see below), whose sum is σ = 70480515744. Its totient is φ = 7438198080.

The previous prime is 28156402649. The next prime is 28156402663. The reversal of 28156402650 is 5620465182.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28156402599 and 28156402608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 861097 + ... + 893196.

It is an arithmetic number, because the mean of its divisors is an integer number (1468344078).

Almost surely, 2^28156402650 is an apocalyptic number.

28156402650 is an abundant number, since it is smaller than the sum of its proper divisors (42324113094).

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

28156402650 is a wasteful number, since it uses less digits than its factorization.

28156402650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754415 (or 1754410 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The spelling of 28156402650 in words is "twenty-eight billion, one hundred fifty-six million, four hundred two thousand, six hundred fifty".