28963644 has 12 divisors (see below), whose sum is σ = 67581864. Its totient is φ = 9654544.

The previous prime is 28963603. The next prime is 28963651. The reversal of 28963644 is 44636982.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 28963596 and 28963605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1206807 + ... + 1206830.

It is an arithmetic number, because the mean of its divisors is an integer number (5631822).

Almost surely, 2^28963644 is an apocalyptic number.

It is an amenable number.

28963644 is an abundant number, since it is smaller than the sum of its proper divisors (38618220).

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

28963644 is a wasteful number, since it uses less digits than its factorization.

28963644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2413644 (or 2413642 counting only the distinct ones).

The product of its digits is 248832, while the sum is 42.

The square root of 28963644 is about 5381.7881786633. The cubic root of 28963644 is about 307.1032413506.

The spelling of 28963644 in words is "twenty-eight million, nine hundred sixty-three thousand, six hundred forty-four".