28177764258 has 16 divisors (see below), whose sum is σ = 64406318400. Its totient is φ = 8050789776.

The previous prime is 28177764217. The next prime is 28177764269. The reversal of 28177764258 is 85246777182.

It is a junction number, because it is equal to n+sod(n) for n = 28177764198 and 28177764207.

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, 335449533 + ... + 335449616.

It is an arithmetic number, because the mean of its divisors is an integer number (4025394900).

Almost surely, 2^28177764258 is an apocalyptic number.

28177764258 is an abundant number, since it is smaller than the sum of its proper divisors (36228554142).

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

28177764258 is a wasteful number, since it uses less digits than its factorization.

28177764258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670899161.

The product of its digits is 10536960, while the sum is 57.

The spelling of 28177764258 in words is "twenty-eight billion, one hundred seventy-seven million, seven hundred sixty-four thousand, two hundred fifty-eight".