28084730 has 16 divisors (see below), whose sum is σ = 50647464. Its totient is φ = 11212800.

The previous prime is 28084723. The next prime is 28084741. The reversal of 28084730 is 3748082.

It can be written as a sum of positive squares in 4 ways, for example, as 28079401 + 5329 = 5299^2 + 73^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3674 + ... + 8346.

Almost surely, 2^28084730 is an apocalyptic number.

28084730 is a deficient number, since it is larger than the sum of its proper divisors (22562734).

28084730 is a wasteful number, since it uses less digits than its factorization.

28084730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5281.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28084730 is about 5299.5028068678. The cubic root of 28084730 is about 303.9648865838.

The spelling of 28084730 in words is "twenty-eight million, eighty-four thousand, seven hundred thirty".