28293788460 has 96 divisors (see below), whose sum is σ = 90595878912. Its totient is φ = 6463169280.

The previous prime is 28293788437. The next prime is 28293788527. The reversal of 28293788460 is 6488739282.

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 28293788460.

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, 691165 + ... + 730955.

It is an arithmetic number, because the mean of its divisors is an integer number (943707072).

Almost surely, 2^28293788460 is an apocalyptic number.

28293788460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28293788460 is an abundant number, since it is smaller than the sum of its proper divisors (62302090452).

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

28293788460 is a wasteful number, since it uses less digits than its factorization.

28293788460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41503 (or 41501 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 57.

The spelling of 28293788460 in words is "twenty-eight billion, two hundred ninety-three million, seven hundred eighty-eight thousand, four hundred sixty".