28693730 has 16 divisors (see below), whose sum is σ = 55621944. Its totient is φ = 10594560.

The previous prime is 28693663. The next prime is 28693741. The reversal of 28693730 is 3739682.

It can be written as a sum of positive squares in 4 ways, for example, as 18241441 + 10452289 = 4271^2 + 3233^2 .

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, 110231 + ... + 110490.

Almost surely, 2^28693730 is an apocalyptic number.

28693730 is a deficient number, since it is larger than the sum of its proper divisors (26928214).

28693730 is a wasteful number, since it uses less digits than its factorization.

28693730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220741.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 28693730 is about 5356.6528728302. The cubic root of 28693730 is about 306.1462911368.

The spelling of 28693730 in words is "twenty-eight million, six hundred ninety-three thousand, seven hundred thirty".