28651730 has 8 divisors (see below), whose sum is σ = 51573132. Its totient is φ = 11460688.

The previous prime is 28651729. The next prime is 28651751. The reversal of 28651730 is 3715682.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26183689 + 2468041 = 5117^2 + 1571^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1432577 + ... + 1432596.

Almost surely, 2^28651730 is an apocalyptic number.

28651730 is a deficient number, since it is larger than the sum of its proper divisors (22921402).

28651730 is a wasteful number, since it uses less digits than its factorization.

28651730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865180.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 28651730 is about 5352.7310786177. The cubic root of 28651730 is about 305.9968459099.

The spelling of 28651730 in words is "twenty-eight million, six hundred fifty-one thousand, seven hundred thirty".