28438741190256 has 80 divisors (see below), whose sum is σ = 78443767539456. Its totient is φ = 8856554370048.

The previous prime is 28438741190191. The next prime is 28438741190267. The reversal of 28438741190256 is 65209114783482.

It is a self number, because there is not a number n which added to its sum of digits gives 28438741190256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299484265 + ... + 299579208.

It is a 1-persistent number, because it is pandigital, but 2⋅28438741190256 = 56877482380512 is not.

Almost surely, 2^{28438741190256} is an apocalyptic number.

It is an amenable number.

28438741190256 is an abundant number, since it is smaller than the sum of its proper divisors (50005026349200).

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

28438741190256 is a wasteful number, since it uses less digits than its factorization.

28438741190256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599063550 (or 599063544 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 60.

The spelling of 28438741190256 in words is "twenty-eight trillion, four hundred thirty-eight billion, seven hundred forty-one million, one hundred ninety thousand, two hundred fifty-six".