28609743 has 4 divisors (see below), whose sum is σ = 38146328. Its totient is φ = 19073160.

The previous prime is 28609727. The next prime is 28609751. The reversal of 28609743 is 34790682.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28609743 - 2⁴ = 28609727 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 (28609543) 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, 4768288 + ... + 4768293.

It is an arithmetic number, because the mean of its divisors is an integer number (9536582).

Almost surely, 2^28609743 is an apocalyptic number.

28609743 is a deficient number, since it is larger than the sum of its proper divisors (9536585).

28609743 is an equidigital number, since it uses as much as digits as its factorization.

28609743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9536584.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 28609743 is about 5348.8076241346. The cubic root of 28609743 is about 305.8473008905.

The spelling of 28609743 in words is "twenty-eight million, six hundred nine thousand, seven hundred forty-three".