28890873875 has 32 divisors (see below), whose sum is σ = 36362027520. Its totient is φ = 22917103200.

The previous prime is 28890873859. The next prime is 28890873877. The reversal of 28890873875 is 57837809882.

It is not a de Polignac number, because 28890873875 - 2⁴ = 28890873859 is a prime.

It is a super-2 number, since 2×28890873875² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28890873877) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10247216 + ... + 10250034.

It is an arithmetic number, because the mean of its divisors is an integer number (1136313360).

Almost surely, 2^28890873875 is an apocalyptic number.

28890873875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28890873875 is a deficient number, since it is larger than the sum of its proper divisors (7471153645).

28890873875 is a wasteful number, since it uses less digits than its factorization.

28890873875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500 (or 3490 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 65.

The spelling of 28890873875 in words is "twenty-eight billion, eight hundred ninety million, eight hundred seventy-three thousand, eight hundred seventy-five".