28342673 has 4 divisors (see below), whose sum is σ = 28661220. Its totient is φ = 28024128.

The previous prime is 28342667. The next prime is 28342679. The reversal of 28342673 is 37624382.

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

It is an interprime number because it is at equal distance from previous prime (28342667) and next prime (28342679).

It can be written as a sum of positive squares in 2 ways, for example, as 19509889 + 8832784 = 4417^2 + 2972^2 .

It is a cyclic number.

It is not a de Polignac number, because 28342673 - 2¹² = 28338577 is a prime.

It is a super-2 number, since 2×28342673² = 1606614225569858, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28342679) 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, 159140 + ... + 159317.

It is an arithmetic number, because the mean of its divisors is an integer number (7165305).

Almost surely, 2^28342673 is an apocalyptic number.

It is an amenable number.

28342673 is a deficient number, since it is larger than the sum of its proper divisors (318547).

28342673 is an equidigital number, since it uses as much as digits as its factorization.

28342673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318546.

The product of its digits is 48384, while the sum is 35.

The square root of 28342673 is about 5323.7837108583. The cubic root of 28342673 is about 304.8926362234.

The spelling of 28342673 in words is "twenty-eight million, three hundred forty-two thousand, six hundred seventy-three".