28761447575 has 24 divisors (see below), whose sum is σ = 40765486080. Its totient is φ = 19719036000.

The previous prime is 28761447563. The next prime is 28761447599. The reversal of 28761447575 is 57574416782.

It is not a de Polignac number, because 28761447575 - 2¹² = 28761443479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28761447575.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1979186 + ... + 1993664.

It is an arithmetic number, because the mean of its divisors is an integer number (1698561920).

Almost surely, 2^28761447575 is an apocalyptic number.

28761447575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28761447575 is a deficient number, since it is larger than the sum of its proper divisors (12004038505).

28761447575 is a wasteful number, since it uses less digits than its factorization.

28761447575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25847 (or 25842 counting only the distinct ones).

The product of its digits is 13171200, while the sum is 56.

The spelling of 28761447575 in words is "twenty-eight billion, seven hundred sixty-one million, four hundred forty-seven thousand, five hundred seventy-five".