28440336 has 20 divisors (see below), whose sum is σ = 73470992. Its totient is φ = 9480096.

The previous prime is 28440331. The next prime is 28440341. The reversal of 28440336 is 63304482.

It is an interprime number because it is at equal distance from previous prime (28440331) and next prime (28440341).

It is not an unprimeable number, because it can be changed into a prime (28440331) 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, 296206 + ... + 296301.

Almost surely, 2^28440336 is an apocalyptic number.

It is an amenable number.

28440336 is an abundant number, since it is smaller than the sum of its proper divisors (45030656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28440336 is a wasteful number, since it uses less digits than its factorization.

28440336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592518 (or 592512 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 28440336 is about 5332.9481527575. The cubic root of 28440336 is about 305.2424337809.

The spelling of 28440336 in words is "twenty-eight million, four hundred forty thousand, three hundred thirty-six".