28733357 has 4 divisors (see below), whose sum is σ = 28747200. Its totient is φ = 28719516.

The previous prime is 28733351. The next prime is 28733359. The reversal of 28733357 is 75333782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28733357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28733357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28733351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3107 + ... + 8192.

It is an arithmetic number, because the mean of its divisors is an integer number (7186800).

Almost surely, 2^28733357 is an apocalyptic number.

It is an amenable number.

28733357 is a deficient number, since it is larger than the sum of its proper divisors (13843).

28733357 is a wasteful number, since it uses less digits than its factorization.

28733357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13842.

The product of its digits is 105840, while the sum is 38.

The square root of 28733357 is about 5360.3504549609. The cubic root of 28733357 is about 306.2871590618.

The spelling of 28733357 in words is "twenty-eight million, seven hundred thirty-three thousand, three hundred fifty-seven".