28012296280 has 16 divisors (see below), whose sum is σ = 63027666720. Its totient is φ = 11204918496.

The previous prime is 28012296269. The next prime is 28012296281. The reversal of 28012296280 is 8269221082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 700307407 = 28012296280 / (2 + 8 + 0 + 1 + 2 + 2 + 9 + 6 + 2 + 8 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28012296281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350153664 + ... + 350153743.

It is an arithmetic number, because the mean of its divisors is an integer number (3939229170).

Almost surely, 2^28012296280 is an apocalyptic number.

28012296280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28012296280 is an abundant number, since it is smaller than the sum of its proper divisors (35015370440).

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

28012296280 is a wasteful number, since it uses less digits than its factorization.

28012296280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700307418 (or 700307414 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 28012296280 in words is "twenty-eight billion, twelve million, two hundred ninety-six thousand, two hundred eighty".