28026730 has 8 divisors (see below), whose sum is σ = 50448132. Its totient is φ = 11210688.

The previous prime is 28026721. The next prime is 28026737. The reversal of 28026730 is 3762082.

It can be written as a sum of positive squares in 2 ways, for example, as 26491609 + 1535121 = 5147^2 + 1239^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28026737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1401327 + ... + 1401346.

Almost surely, 2^28026730 is an apocalyptic number.

28026730 is a deficient number, since it is larger than the sum of its proper divisors (22421402).

28026730 is a wasteful number, since it uses less digits than its factorization.

28026730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802680.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 28026730 is about 5294.0277672109. The cubic root of 28026730 is about 303.7554950543.

The spelling of 28026730 in words is "twenty-eight million, twenty-six thousand, seven hundred thirty".