28288430 has 16 divisors (see below), whose sum is σ = 52562304. Its totient is φ = 10950240.

The previous prime is 28288411. The next prime is 28288433. The reversal of 28288430 is 3488282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28288433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45317 + ... + 45936.

It is an arithmetic number, because the mean of its divisors is an integer number (3285144).

Almost surely, 2^28288430 is an apocalyptic number.

28288430 is a deficient number, since it is larger than the sum of its proper divisors (24273874).

28288430 is a wasteful number, since it uses less digits than its factorization.

28288430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91291.

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 28288430 is about 5318.6868680155. The cubic root of 28288430 is about 304.6980079918.

The spelling of 28288430 in words is "twenty-eight million, two hundred eighty-eight thousand, four hundred thirty".