28489492 has 6 divisors (see below), whose sum is σ = 49856618. Its totient is φ = 14244744.

The previous prime is 28489471. The next prime is 28489537. The reversal of 28489492 is 29498482.

It can be written as a sum of positive squares in only one way, i.e., 24940036 + 3549456 = 4994^2 + 1884^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3561183 + ... + 3561190.

Almost surely, 2^28489492 is an apocalyptic number.

It is an amenable number.

28489492 is a deficient number, since it is larger than the sum of its proper divisors (21367126).

28489492 is a wasteful number, since it uses less digits than its factorization.

28489492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7122377 (or 7122375 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The square root of 28489492 is about 5337.5548709123. The cubic root of 28489492 is about 305.4181919110.

The spelling of 28489492 in words is "twenty-eight million, four hundred eighty-nine thousand, four hundred ninety-two".