28205056494 has 40 divisors (see below), whose sum is σ = 63230249808. Its totient is φ = 9397218240.

The previous prime is 28205056489. The next prime is 28205056499. The reversal of 28205056494 is 49465050282.

28205056494 is a `hidden beast` number, since 2 + 82 + 0 + 5 + 0 + 564 + 9 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (28205056489) and next prime (28205056499).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28205056499) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 309799 + ... + 390365.

Almost surely, 2^28205056494 is an apocalyptic number.

28205056494 is an abundant number, since it is smaller than the sum of its proper divisors (35025193314).

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

28205056494 is a wasteful number, since it uses less digits than its factorization.

28205056494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82742 (or 82733 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 28205056494 in words is "twenty-eight billion, two hundred five million, fifty-six thousand, four hundred ninety-four".