28437872875 has 16 divisors (see below), whose sum is σ = 36245589120. Its totient is φ = 22266244800.

The previous prime is 28437872863. The next prime is 28437872899. The reversal of 28437872875 is 57827873482.

It is a happy number.

It is not a de Polignac number, because 28437872875 - 2⁷ = 28437872747 is a prime.

It is a super-2 number, since 2×28437872875² (a number of 22 digits) contains 22 as substring.

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, 2414370 + ... + 2426119.

It is an arithmetic number, because the mean of its divisors is an integer number (2265349320).

Almost surely, 2^28437872875 is an apocalyptic number.

28437872875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28437872875 is a deficient number, since it is larger than the sum of its proper divisors (7807716245).

28437872875 is an equidigital number, since it uses as much as digits as its factorization.

28437872875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4840551 (or 4840541 counting only the distinct ones).

The product of its digits is 42147840, while the sum is 61.

The spelling of 28437872875 in words is "twenty-eight billion, four hundred thirty-seven million, eight hundred seventy-two thousand, eight hundred seventy-five".