28894499 has 4 divisors (see below), whose sum is σ = 28914336. Its totient is φ = 28874664.

The previous prime is 28894471. The next prime is 28894501. The reversal of 28894499 is 99449882.

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 28894499 - 2¹² = 28890403 is a prime.

It is a super-2 number, since 2×28894499² = 1669784144922002, which contains 22 as substring.

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 28894499.

It is not an unprimeable number, because it can be changed into a prime (28894199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7544 + ... + 10709.

It is an arithmetic number, because the mean of its divisors is an integer number (7228584).

Almost surely, 2^28894499 is an apocalyptic number.

28894499 is a deficient number, since it is larger than the sum of its proper divisors (19837).

28894499 is a wasteful number, since it uses less digits than its factorization.

28894499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19836.

The product of its digits is 1492992, while the sum is 53.

The square root of 28894499 is about 5375.3603600131. The cubic root of 28894499 is about 306.8586637701.

The spelling of 28894499 in words is "twenty-eight million, eight hundred ninety-four thousand, four hundred ninety-nine".