28294499 has 4 divisors (see below), whose sum is σ = 28317240. Its totient is φ = 28271760.

The previous prime is 28294481. The next prime is 28294501. The reversal of 28294499 is 99449282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28294499 - 2²⁰ = 27245923 is a prime.

It is a super-2 number, since 2×28294499² = 1601157347322002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28294429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9389 + ... + 12030.

It is an arithmetic number, because the mean of its divisors is an integer number (7079310).

Almost surely, 2^28294499 is an apocalyptic number.

28294499 is a deficient number, since it is larger than the sum of its proper divisors (22741).

28294499 is a wasteful number, since it uses less digits than its factorization.

28294499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22740.

The product of its digits is 373248, while the sum is 47.

The square root of 28294499 is about 5319.2573729798. The cubic root of 28294499 is about 304.7197964047.

The spelling of 28294499 in words is "twenty-eight million, two hundred ninety-four thousand, four hundred ninety-nine".