28396646 has 4 divisors (see below), whose sum is σ = 42594972. Its totient is φ = 14198322.

The previous prime is 28396637. The next prime is 28396661. The reversal of 28396646 is 64669382.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28396597 and 28396606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7099160 + ... + 7099163.

It is an arithmetic number, because the mean of its divisors is an integer number (10648743).

Almost surely, 2^28396646 is an apocalyptic number.

28396646 is a deficient number, since it is larger than the sum of its proper divisors (14198326).

28396646 is a wasteful number, since it uses less digits than its factorization.

28396646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14198325.

The product of its digits is 373248, while the sum is 44.

The square root of 28396646 is about 5328.8503450557. The cubic root of 28396646 is about 305.0860493568.

The spelling of 28396646 in words is "twenty-eight million, three hundred ninety-six thousand, six hundred forty-six".