28806730 has 16 divisors (see below), whose sum is σ = 52071624. Its totient is φ = 11473920.

The previous prime is 28806707. The next prime is 28806733. The reversal of 28806730 is 3760882.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28547649 + 259081 = 5343^2 + 509^2 .

It is not an unprimeable number, because it can be changed into a prime (28806733) 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, 3567 + ... + 8386.

Almost surely, 2^28806730 is an apocalyptic number.

28806730 is a deficient number, since it is larger than the sum of its proper divisors (23264894).

28806730 is a wasteful number, since it uses less digits than its factorization.

28806730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12201.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28806730 is about 5367.1901401012. The cubic root of 28806730 is about 306.5476473130.

The spelling of 28806730 in words is "twenty-eight million, eight hundred six thousand, seven hundred thirty".