28963363925 has 36 divisors (see below), whose sum is σ = 38147592996. Its totient is φ = 21810297600.

The previous prime is 28963363909. The next prime is 28963363937. The reversal of 28963363925 is 52936336982.

It can be written as a sum of positive squares in 6 ways, for example, as 104489284 + 28858874641 = 10222^2 + 169879^2 .

It is not a de Polignac number, because 28963363925 - 2⁴ = 28963363909 is a prime.

It is a Duffinian number.

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 35 ways as a sum of consecutive naturals, for example, 1406705 + ... + 1427145.

It is an arithmetic number, because the mean of its divisors is an integer number (1059655361).

Almost surely, 2^28963363925 is an apocalyptic number.

28963363925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28963363925 is a deficient number, since it is larger than the sum of its proper divisors (9184229071).

28963363925 is a wasteful number, since it uses less digits than its factorization.

28963363925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20646 (or 20622 counting only the distinct ones).

The product of its digits is 12597120, while the sum is 56.

The spelling of 28963363925 in words is "twenty-eight billion, nine hundred sixty-three million, three hundred sixty-three thousand, nine hundred twenty-five".