28253250780 has 24 divisors (see below), whose sum is σ = 79109102352. Its totient is φ = 7534200192.

The previous prime is 28253250769. The next prime is 28253250799. The reversal of 28253250780 is 8705235282.

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, 235443697 + ... + 235443816.

It is an arithmetic number, because the mean of its divisors is an integer number (3296212598).

Almost surely, 2^28253250780 is an apocalyptic number.

28253250780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28253250780 is an abundant number, since it is smaller than the sum of its proper divisors (50855851572).

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

28253250780 is a wasteful number, since it uses less digits than its factorization.

28253250780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470887525 (or 470887523 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 42.

The spelling of 28253250780 in words is "twenty-eight billion, two hundred fifty-three million, two hundred fifty thousand, seven hundred eighty".