28733441825 has 24 divisors (see below), whose sum is σ = 38876142720. Its totient is φ = 20892945600.

The previous prime is 28733441813. The next prime is 28733441843. The reversal of 28733441825 is 52814433782.

It is not a de Polignac number, because 28733441825 - 2²⁸ = 28465006369 is a prime.

It is a super-2 number, since 2×28733441825² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28733441825.

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, 2578616 + ... + 2589734.

It is an arithmetic number, because the mean of its divisors is an integer number (1619839280).

Almost surely, 2^28733441825 is an apocalyptic number.

28733441825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28733441825 is a deficient number, since it is larger than the sum of its proper divisors (10142700895).

28733441825 is a wasteful number, since it uses less digits than its factorization.

28733441825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20537 (or 20532 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 47.

The spelling of 28733441825 in words is "twenty-eight billion, seven hundred thirty-three million, four hundred forty-one thousand, eight hundred twenty-five".