28156892700 has 72 divisors (see below), whose sum is σ = 83669127472. Its totient is φ = 7305569280.

The previous prime is 28156892641. The next prime is 28156892723. The reversal of 28156892700 is 729865182.

It is a self number, because there is not a number n which added to its sum of digits gives 28156892700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1257229 + ... + 1279428.

Almost surely, 2^28156892700 is an apocalyptic number.

28156892700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28156892700 is an abundant number, since it is smaller than the sum of its proper divisors (55512234772).

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

28156892700 is a wasteful number, since it uses less digits than its factorization.

28156892700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536711 (or 2536704 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 28156892700 in words is "twenty-eight billion, one hundred fifty-six million, eight hundred ninety-two thousand, seven hundred".