28819946 has 8 divisors (see below), whose sum is σ = 43658244. Its totient is φ = 14267200.

The previous prime is 28819937. The next prime is 28819949. The reversal of 28819946 is 64991882.

It can be written as a sum of positive squares in 2 ways, for example, as 26061025 + 2758921 = 5105^2 + 1661^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28819946.

It is not an unprimeable number, because it can be changed into a prime (28819949) 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, 71135 + ... + 71538.

Almost surely, 2^28819946 is an apocalyptic number.

28819946 is a deficient number, since it is larger than the sum of its proper divisors (14838298).

28819946 is a wasteful number, since it uses less digits than its factorization.

28819946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142776.

The product of its digits is 248832, while the sum is 47.

The square root of 28819946 is about 5368.4211831785. The cubic root of 28819946 is about 306.5945196273.

The spelling of 28819946 in words is "twenty-eight million, eight hundred nineteen thousand, nine hundred forty-six".