28710299525 has 12 divisors (see below), whose sum is σ = 35635740000. Its totient is φ = 22945679280.

The previous prime is 28710299507. The next prime is 28710299549. The reversal of 28710299525 is 52599201782.

It is a happy number.

It is not a de Polignac number, because 28710299525 - 2¹⁰ = 28710298501 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 538025 + ... + 588974.

It is an arithmetic number, because the mean of its divisors is an integer number (2969645000).

Almost surely, 2^28710299525 is an apocalyptic number.

28710299525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28710299525 is a deficient number, since it is larger than the sum of its proper divisors (6925440475).

28710299525 is a wasteful number, since it uses less digits than its factorization.

28710299525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128028 (or 1128023 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 50.

The spelling of 28710299525 in words is "twenty-eight billion, seven hundred ten million, two hundred ninety-nine thousand, five hundred twenty-five".