28877639025 has 24 divisors (see below), whose sum is σ = 47754880000. Its totient is φ = 15398015040.

The previous prime is 28877639023. The next prime is 28877639051. The reversal of 28877639025 is 52093677882.

It is not a de Polignac number, because 28877639025 - 2¹ = 28877639023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28877639023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 320976 + ... + 400974.

Almost surely, 2^28877639025 is an apocalyptic number.

28877639025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28877639025 is a deficient number, since it is larger than the sum of its proper divisors (18877240975).

28877639025 is a wasteful number, since it uses less digits than its factorization.

28877639025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84825 (or 84820 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 28877639025 in words is "twenty-eight billion, eight hundred seventy-seven million, six hundred thirty-nine thousand, twenty-five".