28751866460 has 24 divisors (see below), whose sum is σ = 60390229200. Its totient is φ = 11498592384.

The previous prime is 28751866447. The next prime is 28751866487. The reversal of 28751866460 is 6466815782.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22934 + ... + 240893.

It is an arithmetic number, because the mean of its divisors is an integer number (2516259550).

Almost surely, 2^28751866460 is an apocalyptic number.

28751866460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28751866460 is an abundant number, since it is smaller than the sum of its proper divisors (31638362740).

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

28751866460 is a wasteful number, since it uses less digits than its factorization.

28751866460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269285 (or 269283 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 28751866460 in words is "twenty-eight billion, seven hundred fifty-one million, eight hundred sixty-six thousand, four hundred sixty".