28574694660 has 96 divisors (see below), whose sum is σ = 81992881152. Its totient is φ = 7433205120.

The previous prime is 28574694619. The next prime is 28574694679. The reversal of 28574694660 is 6649647582.

It is a self number, because there is not a number n which added to its sum of digits gives 28574694660.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 379555 + ... + 448565.

It is an arithmetic number, because the mean of its divisors is an integer number (854092512).

Almost surely, 2^28574694660 is an apocalyptic number.

28574694660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28574694660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40996440576).

28574694660 is an abundant number, since it is smaller than the sum of its proper divisors (53418186492).

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

28574694660 is a wasteful number, since it uses less digits than its factorization.

28574694660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69193 (or 69191 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 57.

The spelling of 28574694660 in words is "twenty-eight billion, five hundred seventy-four million, six hundred ninety-four thousand, six hundred sixty".