28705324 has 6 divisors (see below), whose sum is σ = 50234324. Its totient is φ = 14352660.

The previous prime is 28705321. The next prime is 28705343. The reversal of 28705324 is 42350782.

It is not an unprimeable number, because it can be changed into a prime (28705321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3588162 + ... + 3588169.

Almost surely, 2^28705324 is an apocalyptic number.

It is an amenable number.

28705324 is a deficient number, since it is larger than the sum of its proper divisors (21529000).

28705324 is a wasteful number, since it uses less digits than its factorization.

28705324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7176335 (or 7176333 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 28705324 is about 5357.7349691824. The cubic root of 28705324 is about 306.1875194486.

The spelling of 28705324 in words is "twenty-eight million, seven hundred five thousand, three hundred twenty-four".