28345700178 has 48 divisors (see below), whose sum is σ = 61593929280. Its totient is φ = 9421191648.

The previous prime is 28345700171. The next prime is 28345700213. The reversal of 28345700178 is 87100754382.

28345700178 is a `hidden beast` number, since 2 + 8 + 3 + 4 + 570 + 0 + 1 + 78 = 666.

It is not an unprimeable number, because it can be changed into a prime (28345700171) 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, 13007493 + ... + 13009671.

It is an arithmetic number, because the mean of its divisors is an integer number (1283206860).

Almost surely, 2^28345700178 is an apocalyptic number.

28345700178 is an abundant number, since it is smaller than the sum of its proper divisors (33248229102).

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

28345700178 is a wasteful number, since it uses less digits than its factorization.

28345700178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951 (or 3948 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 28345700178 in words is "twenty-eight billion, three hundred forty-five million, seven hundred thousand, one hundred seventy-eight".