28145147140 has 48 divisors (see below), whose sum is σ = 64583467200. Its totient is φ = 10217854080.

The previous prime is 28145147117. The next prime is 28145147243. The reversal of 28145147140 is 4174154182.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28145147140.

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, 30511 + ... + 239209.

It is an arithmetic number, because the mean of its divisors is an integer number (1345488900).

Almost surely, 2^28145147140 is an apocalyptic number.

28145147140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28145147140 is an abundant number, since it is smaller than the sum of its proper divisors (36438320060).

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

28145147140 is a wasteful number, since it uses less digits than its factorization.

28145147140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209332 (or 209330 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The spelling of 28145147140 in words is "twenty-eight billion, one hundred forty-five million, one hundred forty-seven thousand, one hundred forty".