28753738 has 8 divisors (see below), whose sum is σ = 46448388. Its totient is φ = 13270944.

The previous prime is 28753729. The next prime is 28753757. The reversal of 28753738 is 83735782.

It can be written as a sum of positive squares in 2 ways, for example, as 25170289 + 3583449 = 5017^2 + 1893^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28753694 and 28753703.

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, 552931 + ... + 552982.

Almost surely, 2^28753738 is an apocalyptic number.

28753738 is a deficient number, since it is larger than the sum of its proper divisors (17694650).

28753738 is a wasteful number, since it uses less digits than its factorization.

28753738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105928.

The product of its digits is 282240, while the sum is 43.

The square root of 28753738 is about 5362.2512063498. The cubic root of 28753738 is about 306.3595599676.

The spelling of 28753738 in words is "twenty-eight million, seven hundred fifty-three thousand, seven hundred thirty-eight".