25428018228 has 24 divisors (see below), whose sum is σ = 59334948288. Its totient is φ = 8475590976.

The previous prime is 25428018191. The next prime is 25428018323. The reversal of 25428018228 is 82281082452.

It is a super-2 number, since 2×25428018228² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25428018228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297400 + ... + 373232.

It is an arithmetic number, because the mean of its divisors is an integer number (2472289512).

Almost surely, 2^25428018228 is an apocalyptic number.

It is an amenable number.

25428018228 is an abundant number, since it is smaller than the sum of its proper divisors (33906930060).

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

25428018228 is a wasteful number, since it uses less digits than its factorization.

25428018228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103783 (or 103781 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 42.

The spelling of 25428018228 in words is "twenty-five billion, four hundred twenty-eight million, eighteen thousand, two hundred twenty-eight".