28186098140 has 12 divisors (see below), whose sum is σ = 59190806136. Its totient is φ = 11274439248.

The previous prime is 28186098137. The next prime is 28186098173. The reversal of 28186098140 is 4189068182.

It is a happy number.

It is a super-2 number, since 2×28186098140² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 704652434 + ... + 704652473.

It is an arithmetic number, because the mean of its divisors is an integer number (4932567178).

Almost surely, 2^28186098140 is an apocalyptic number.

28186098140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28186098140 is an abundant number, since it is smaller than the sum of its proper divisors (31004707996).

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

28186098140 is a wasteful number, since it uses less digits than its factorization.

28186098140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409304916 (or 1409304914 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 47.

The spelling of 28186098140 in words is "twenty-eight billion, one hundred eighty-six million, ninety-eight thousand, one hundred forty".