28178008782 has 32 divisors (see below), whose sum is σ = 70262049024. Its totient is φ = 7318963200.

The previous prime is 28178008763. The next prime is 28178008819. The reversal of 28178008782 is 28780087182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30495219 + ... + 30496142.

It is an arithmetic number, because the mean of its divisors is an integer number (2195689032).

Almost surely, 2^28178008782 is an apocalyptic number.

28178008782 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28178008782 is an abundant number, since it is smaller than the sum of its proper divisors (42084040242).

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

28178008782 is a wasteful number, since it uses less digits than its factorization.

28178008782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60991384.

The product of its (nonzero) digits is 802816, while the sum is 51.

The spelling of 28178008782 in words is "twenty-eight billion, one hundred seventy-eight million, eight thousand, seven hundred eighty-two".