28405033875 has 24 divisors (see below), whose sum is σ = 51204809760. Its totient is φ = 15149350800.

The previous prime is 28405033871. The next prime is 28405033913. The reversal of 28405033875 is 57833050482.

28405033875 is a `hidden beast` number, since 2 + 8 + 40 + 503 + 38 + 75 = 666.

It is not a de Polignac number, because 28405033875 - 2² = 28405033871 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28405033875.

It is not an unprimeable number, because it can be changed into a prime (28405033871) 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, 12623335 + ... + 12625584.

It is an arithmetic number, because the mean of its divisors is an integer number (2133533740).

Almost surely, 2^28405033875 is an apocalyptic number.

28405033875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28405033875 is a deficient number, since it is larger than the sum of its proper divisors (22799775885).

28405033875 is a wasteful number, since it uses less digits than its factorization.

28405033875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25248940 (or 25248927 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 28405033875 in words is "twenty-eight billion, four hundred five million, thirty-three thousand, eight hundred seventy-five".