28439452 has 12 divisors (see below), whose sum is σ = 50369256. Its totient is φ = 14048240.

The previous prime is 28439449. The next prime is 28439461. The reversal of 28439452 is 25493482.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42499 + ... + 43162.

It is an arithmetic number, because the mean of its divisors is an integer number (4197438).

Almost surely, 2^28439452 is an apocalyptic number.

It is an amenable number.

28439452 is a deficient number, since it is larger than the sum of its proper divisors (21929804).

28439452 is a wasteful number, since it uses less digits than its factorization.

28439452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85748 (or 85746 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 28439452 is about 5332.8652711277. The cubic root of 28439452 is about 305.2392711705.

The spelling of 28439452 in words is "twenty-eight million, four hundred thirty-nine thousand, four hundred fifty-two".