28250302780 has 24 divisors (see below), whose sum is σ = 67800727008. Its totient is φ = 9685818048.

The previous prime is 28250302763. The next prime is 28250302799. The reversal of 28250302780 is 8720305282.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100893799 + ... + 100894078.

It is an arithmetic number, because the mean of its divisors is an integer number (2825030292).

Almost surely, 2^28250302780 is an apocalyptic number.

28250302780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28250302780 is an abundant number, since it is smaller than the sum of its proper divisors (39550424228).

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

28250302780 is a wasteful number, since it uses less digits than its factorization.

28250302780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201787893 (or 201787891 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 28250302780 in words is "twenty-eight billion, two hundred fifty million, three hundred two thousand, seven hundred eighty".