28463491 has 16 divisors (see below), whose sum is σ = 35100864. Its totient is φ = 22523904.

The previous prime is 28463483. The next prime is 28463507. The reversal of 28463491 is 19436482.

It is a cyclic number.

It is not a de Polignac number, because 28463491 - 2³ = 28463483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28463491.

It is not an unprimeable number, because it can be changed into a prime (28463431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4051 + ... + 8563.

It is an arithmetic number, because the mean of its divisors is an integer number (2193804).

Almost surely, 2^28463491 is an apocalyptic number.

28463491 is a deficient number, since it is larger than the sum of its proper divisors (6637373).

28463491 is a wasteful number, since it uses less digits than its factorization.

28463491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4590.

The product of its digits is 41472, while the sum is 37.

The square root of 28463491 is about 5335.1186491024. The cubic root of 28463491 is about 305.3252500938.

The spelling of 28463491 in words is "twenty-eight million, four hundred sixty-three thousand, four hundred ninety-one".