28335749 has 8 divisors (see below), whose sum is σ = 30796920. Its totient is φ = 25914816.

The previous prime is 28335743. The next prime is 28335751. The reversal of 28335749 is 94753382.

It can be written as a sum of positive squares in 4 ways, for example, as 6666724 + 21669025 = 2582^2 + 4655^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28335749 - 2⁸ = 28335493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28335743) 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, 8582 + ... + 11415.

It is an arithmetic number, because the mean of its divisors is an integer number (3849615).

Almost surely, 2^28335749 is an apocalyptic number.

It is an amenable number.

28335749 is a deficient number, since it is larger than the sum of its proper divisors (2461171).

28335749 is a wasteful number, since it uses less digits than its factorization.

28335749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20119.

The product of its digits is 181440, while the sum is 41.

The square root of 28335749 is about 5323.1333817593. The cubic root of 28335749 is about 304.8678061901.

The spelling of 28335749 in words is "twenty-eight million, three hundred thirty-five thousand, seven hundred forty-nine".