28577284625 has 16 divisors (see below), whose sum is σ = 35779176576. Its totient is φ = 22788286000.

The previous prime is 28577284583. The next prime is 28577284639. The reversal of 28577284625 is 52648277582.

It is a de Polignac number, because none of the positive numbers 2^k-28577284625 is a prime.

It is a super-2 number, since 2×28577284625² (a number of 22 digits) contains 22 as substring.

It is a Duffinian 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, 328679 + ... + 406428.

It is an arithmetic number, because the mean of its divisors is an integer number (2236198536).

Almost surely, 2^28577284625 is an apocalyptic number.

28577284625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28577284625 is a deficient number, since it is larger than the sum of its proper divisors (7201891951).

28577284625 is an equidigital number, since it uses as much as digits as its factorization.

28577284625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735433 (or 735423 counting only the distinct ones).

The product of its digits is 15052800, while the sum is 56.

The spelling of 28577284625 in words is "twenty-eight billion, five hundred seventy-seven million, two hundred eighty-four thousand, six hundred twenty-five".