28442824 has 8 divisors (see below), whose sum is σ = 53330310. Its totient is φ = 14221408.

The previous prime is 28442809. The next prime is 28442831. The reversal of 28442824 is 42824482.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 24108100 + 4334724 = 4910^2 + 2082^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 28442824.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1777669 + ... + 1777684.

Almost surely, 2^28442824 is an apocalyptic number.

It is an amenable number.

28442824 is a deficient number, since it is larger than the sum of its proper divisors (24887486).

28442824 is a wasteful number, since it uses less digits than its factorization.

28442824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3555359 (or 3555355 counting only the distinct ones).

The product of its digits is 32768, while the sum is 34.

The square root of 28442824 is about 5333.1814145030. The cubic root of 28442824 is about 305.2513345317.

The spelling of 28442824 in words is "twenty-eight million, four hundred forty-two thousand, eight hundred twenty-four".