28315749525 has 192 divisors, whose sum is σ = 59612184576. Its totient is φ = 11561472000.

The previous prime is 28315749523. The next prime is 28315749557. The reversal of 28315749525 is 52594751382.

It is not a de Polignac number, because 28315749525 - 2¹ = 28315749523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28315749523) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 14662810 + ... + 14664740.

It is an arithmetic number, because the mean of its divisors is an integer number (310480128).

Almost surely, 2^28315749525 is an apocalyptic number.

28315749525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28315749525 is an abundant number, since it is smaller than the sum of its proper divisors (31296435051).

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

28315749525 is a wasteful number, since it uses less digits than its factorization.

28315749525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052 (or 2047 counting only the distinct ones).

The product of its digits is 3024000, while the sum is 51.

The spelling of 28315749525 in words is "twenty-eight billion, three hundred fifteen million, seven hundred forty-nine thousand, five hundred twenty-five".