28758733 has 4 divisors (see below), whose sum is σ = 29038048. Its totient is φ = 28479420.

The previous prime is 28758727. The next prime is 28758739. The reversal of 28758733 is 33785782.

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 an interprime number because it is at equal distance from previous prime (28758727) and next prime (28758739).

It is a cyclic number.

It is not a de Polignac number, because 28758733 - 2¹³ = 28750541 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 28758733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28758739) 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, 139503 + ... + 139708.

It is an arithmetic number, because the mean of its divisors is an integer number (7259512).

Almost surely, 2^28758733 is an apocalyptic number.

It is an amenable number.

28758733 is a deficient number, since it is larger than the sum of its proper divisors (279315).

28758733 is a wasteful number, since it uses less digits than its factorization.

28758733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279314.

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

The square root of 28758733 is about 5362.7169419987. The cubic root of 28758733 is about 306.3772988485.

The spelling of 28758733 in words is "twenty-eight million, seven hundred fifty-eight thousand, seven hundred thirty-three".