28642860225 has 96 divisors (see below), whose sum is σ = 61270007040. Its totient is φ = 12846712320.

The previous prime is 28642860217. The next prime is 28642860271. The reversal of 28642860225 is 52206824682.

It is not a de Polignac number, because 28642860225 - 2³ = 28642860217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 193237 + ... + 307613.

It is an arithmetic number, because the mean of its divisors is an integer number (638229240).

Almost surely, 2^28642860225 is an apocalyptic number.

28642860225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28642860225 is an abundant number, since it is smaller than the sum of its proper divisors (32627146815).

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

28642860225 is a wasteful number, since it uses less digits than its factorization.

28642860225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114456 (or 114445 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The spelling of 28642860225 in words is "twenty-eight billion, six hundred forty-two million, eight hundred sixty thousand, two hundred twenty-five".