28394472258 has 48 divisors (see below), whose sum is σ = 67241581056. Its totient is φ = 8620709760.

The previous prime is 28394472247. The next prime is 28394472277. The reversal of 28394472258 is 85227449382.

28394472258 is a `hidden beast` number, since 2 + 83 + 94 + 472 + 2 + 5 + 8 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1487166 + ... + 1506137.

It is an arithmetic number, because the mean of its divisors is an integer number (1400866272).

Almost surely, 2^28394472258 is an apocalyptic number.

28394472258 is an abundant number, since it is smaller than the sum of its proper divisors (38847108798).

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

28394472258 is a wasteful number, since it uses less digits than its factorization.

28394472258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993359 (or 2993356 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The spelling of 28394472258 in words is "twenty-eight billion, three hundred ninety-four million, four hundred seventy-two thousand, two hundred fifty-eight".