28782935025 has 216 divisors, whose sum is σ = 56783553120. Its totient is φ = 12813465600.

The previous prime is 28782935017. The next prime is 28782935113. The reversal of 28782935025 is 52053928782.

It is a happy number.

It is not a de Polignac number, because 28782935025 - 2³ = 28782935017 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 207071406 + ... + 207071544.

It is an arithmetic number, because the mean of its divisors is an integer number (262886820).

Almost surely, 2^28782935025 is an apocalyptic number.

28782935025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28782935025 is a deficient number, since it is larger than the sum of its proper divisors (28000618095).

28782935025 is a wasteful number, since it uses less digits than its factorization.

28782935025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 28782935025 in words is "twenty-eight billion, seven hundred eighty-two million, nine hundred thirty-five thousand, twenty-five".