28344636 has 36 divisors (see below), whose sum is σ = 71816472. Its totient is φ = 9426144.

The previous prime is 28344587. The next prime is 28344649. The reversal of 28344636 is 63644382.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28344636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23791 + ... + 24953.

It is an arithmetic number, because the mean of its divisors is an integer number (1994902).

Almost surely, 2^28344636 is an apocalyptic number.

It is an amenable number.

28344636 is an abundant number, since it is smaller than the sum of its proper divisors (43471836).

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

28344636 is a wasteful number, since it uses less digits than its factorization.

28344636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850 (or 1845 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 28344636 is about 5323.9680690252. The cubic root of 28344636 is about 304.8996749671.

The spelling of 28344636 in words is "twenty-eight million, three hundred forty-four thousand, six hundred thirty-six".