28365408556 has 6 divisors (see below), whose sum is σ = 49639464980. Its totient is φ = 14182704276.

The previous prime is 28365408523. The next prime is 28365408563. The reversal of 28365408556 is 65580456382.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3545676066 + ... + 3545676073.

Almost surely, 2^28365408556 is an apocalyptic number.

It is an amenable number.

28365408556 is a deficient number, since it is larger than the sum of its proper divisors (21274056424).

28365408556 is a wasteful number, since it uses less digits than its factorization.

28365408556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7091352143 (or 7091352141 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 52.

It can be divided in two parts, 28365 and 408556, that added together give a square (436921 = 661²).

The spelling of 28365408556 in words is "twenty-eight billion, three hundred sixty-five million, four hundred eight thousand, five hundred fifty-six".