28062730 has 16 divisors (see below), whose sum is σ = 50637384. Its totient is φ = 11197440.

The previous prime is 28062707. The next prime is 28062731. The reversal of 28062730 is 3726082.

It can be written as a sum of positive squares in 4 ways, for example, as 23707161 + 4355569 = 4869^2 + 2087^2 .

It is not an unprimeable number, because it can be changed into a prime (28062731) 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, 1090 + ... + 7570.

Almost surely, 2^28062730 is an apocalyptic number.

28062730 is a deficient number, since it is larger than the sum of its proper divisors (22574654).

28062730 is a wasteful number, since it uses less digits than its factorization.

28062730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6921.

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

The square root of 28062730 is about 5297.4267338020. The cubic root of 28062730 is about 303.8854961773.

The spelling of 28062730 in words is "twenty-eight million, sixty-two thousand, seven hundred thirty".