28502475 has 24 divisors (see below), whose sum is σ = 47288640. Its totient is φ = 15148320.

The previous prime is 28502471. The next prime is 28502521. The reversal of 28502475 is 57420582.

It is not a de Polignac number, because 28502475 - 2² = 28502471 is a prime.

It is a super-2 number, since 2×28502475² = 1624782162251250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28502471) 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, 30972 + ... + 31878.

It is an arithmetic number, because the mean of its divisors is an integer number (1970360).

Almost surely, 2^28502475 is an apocalyptic number.

28502475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28502475 is a deficient number, since it is larger than the sum of its proper divisors (18786165).

28502475 is a wasteful number, since it uses less digits than its factorization.

28502475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339 (or 1334 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 28502475 is about 5338.7709259716. The cubic root of 28502475 is about 305.4645790983.

It can be divided in two parts, 28 and 502475, that added together give a triangular number (502503 = T₁₀₀₂).

The spelling of 28502475 in words is "twenty-eight million, five hundred two thousand, four hundred seventy-five".