28140861858 has 32 divisors (see below), whose sum is σ = 57968635200. Its totient is φ = 9100589760.

The previous prime is 28140861841. The next prime is 28140861871. The reversal of 28140861858 is 85816804182.

It is a super-2 number, since 2×28140861858² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28140861858.

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, 104128 + ... + 259083.

It is an arithmetic number, because the mean of its divisors is an integer number (1811519850).

Almost surely, 2^28140861858 is an apocalyptic number.

28140861858 is an abundant number, since it is smaller than the sum of its proper divisors (29827773342).

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

28140861858 is a wasteful number, since it uses less digits than its factorization.

28140861858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363602.

The product of its (nonzero) digits is 983040, while the sum is 51.

The spelling of 28140861858 in words is "twenty-eight billion, one hundred forty million, eight hundred sixty-one thousand, eight hundred fifty-eight".