28646916 has 12 divisors (see below), whose sum is σ = 66842832. Its totient is φ = 9548968.

The previous prime is 28646911. The next prime is 28646929. The reversal of 28646916 is 61964682.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×28646916² = 1641291592622112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28646911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1193610 + ... + 1193633.

It is an arithmetic number, because the mean of its divisors is an integer number (5570236).

Almost surely, 2^28646916 is an apocalyptic number.

It is an amenable number.

28646916 is an abundant number, since it is smaller than the sum of its proper divisors (38195916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28646916 is a wasteful number, since it uses less digits than its factorization.

28646916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387250 (or 2387248 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 28646916 is about 5352.2813827376. The cubic root of 28646916 is about 305.9797073134.

The spelling of 28646916 in words is "twenty-eight million, six hundred forty-six thousand, nine hundred sixteen".