28678349 has 8 divisors (see below), whose sum is σ = 32850048. Its totient is φ = 24525360.

The previous prime is 28678333. The next prime is 28678387. The reversal of 28678349 is 94387682.

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 28678349 - 2⁴ = 28678333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28678399) 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, 1217 + ... + 7670.

It is an arithmetic number, because the mean of its divisors is an integer number (4106256).

Almost surely, 2^28678349 is an apocalyptic number.

It is an amenable number.

28678349 is a deficient number, since it is larger than the sum of its proper divisors (4171699).

28678349 is an equidigital number, since it uses as much as digits as its factorization.

28678349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9355.

The product of its digits is 580608, while the sum is 47.

The square root of 28678349 is about 5355.2169890678. The cubic root of 28678349 is about 306.0915790943.

The spelling of 28678349 in words is "twenty-eight million, six hundred seventy-eight thousand, three hundred forty-nine".