28001128494 has 16 divisors (see below), whose sum is σ = 56004560640. Its totient is φ = 9333325560.

The previous prime is 28001128489. The next prime is 28001128501. The reversal of 28001128494 is 49482110082.

It is a super-3 number, since 3×28001128494³ (a number of 32 digits) contains 333 as substring.

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, 89649 + ... + 253059.

It is an arithmetic number, because the mean of its divisors is an integer number (3500285040).

Almost surely, 2^28001128494 is an apocalyptic number.

28001128494 is an abundant number, since it is smaller than the sum of its proper divisors (28003432146).

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

28001128494 is a wasteful number, since it uses less digits than its factorization.

28001128494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191975.

The product of its (nonzero) digits is 36864, while the sum is 39.

It can be divided in two parts, 280011 and 28494, that added together give a triangular number (308505 = T₇₈₅).

The spelling of 28001128494 in words is "twenty-eight billion, one million, one hundred twenty-eight thousand, four hundred ninety-four".