28864424 has 8 divisors (see below), whose sum is σ = 54120810. Its totient is φ = 14432208.

The previous prime is 28864421. The next prime is 28864499. The reversal of 28864424 is 42446882.

It can be written as a sum of positive squares in only one way, i.e., 22259524 + 6604900 = 4718^2 + 2570^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28864421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1804019 + ... + 1804034.

Almost surely, 2^28864424 is an apocalyptic number.

It is an amenable number.

28864424 is a deficient number, since it is larger than the sum of its proper divisors (25256386).

28864424 is a wasteful number, since it uses less digits than its factorization.

28864424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3608059 (or 3608055 counting only the distinct ones).

The product of its digits is 98304, while the sum is 38.

The square root of 28864424 is about 5372.5621448244. The cubic root of 28864424 is about 306.7521616281.

The spelling of 28864424 in words is "twenty-eight million, eight hundred sixty-four thousand, four hundred twenty-four".