28391829 has 8 divisors (see below), whose sum is σ = 38088672. Its totient is φ = 18811440.

The previous prime is 28391827. The next prime is 28391843. The reversal of 28391829 is 92819382.

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

It is not a de Polignac number, because 28391829 - 2¹ = 28391827 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28391827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28542 + ... + 29519.

It is an arithmetic number, because the mean of its divisors is an integer number (4761084).

Almost surely, 2^28391829 is an apocalyptic number.

It is an amenable number.

28391829 is a deficient number, since it is larger than the sum of its proper divisors (9696843).

28391829 is a wasteful number, since it uses less digits than its factorization.

28391829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58227.

The product of its digits is 62208, while the sum is 42.

The square root of 28391829 is about 5328.3983522256. The cubic root of 28391829 is about 305.0687975236.

The spelling of 28391829 in words is "twenty-eight million, three hundred ninety-one thousand, eight hundred twenty-nine".