28387952782 has 32 divisors (see below), whose sum is σ = 51240026880. Its totient is φ = 11522865600.

The previous prime is 28387952759. The next prime is 28387952819. The reversal of 28387952782 is 28725978382.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28387952782.

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, 1171978 + ... + 1195954.

It is an arithmetic number, because the mean of its divisors is an integer number (1601250840).

Almost surely, 2^28387952782 is an apocalyptic number.

28387952782 is a deficient number, since it is larger than the sum of its proper divisors (22852074098).

28387952782 is a wasteful number, since it uses less digits than its factorization.

28387952782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28456.

The product of its digits is 27095040, while the sum is 61.

The spelling of 28387952782 in words is "twenty-eight billion, three hundred eighty-seven million, nine hundred fifty-two thousand, seven hundred eighty-two".