28973771850 has 48 divisors (see below), whose sum is σ = 72270365472. Its totient is φ = 7681671360.

The previous prime is 28973771837. The next prime is 28973771851. The reversal of 28973771850 is 5817737982.

It is not an unprimeable number, because it can be changed into a prime (28973771851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 532312 + ... + 584211.

It is an arithmetic number, because the mean of its divisors is an integer number (1505632614).

Almost surely, 2^28973771850 is an apocalyptic number.

28973771850 is an abundant number, since it is smaller than the sum of its proper divisors (43296593622).

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

28973771850 is a wasteful number, since it uses less digits than its factorization.

28973771850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116711 (or 1116706 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 57.

The spelling of 28973771850 in words is "twenty-eight billion, nine hundred seventy-three million, seven hundred seventy-one thousand, eight hundred fifty".