28799644 has 6 divisors (see below), whose sum is σ = 50399384. Its totient is φ = 14399820.

The previous prime is 28799633. The next prime is 28799669. The reversal of 28799644 is 44699782.

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, 3599952 + ... + 3599959.

Almost surely, 2^28799644 is an apocalyptic number.

It is an amenable number.

28799644 is a deficient number, since it is larger than the sum of its proper divisors (21599740).

28799644 is a wasteful number, since it uses less digits than its factorization.

28799644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7199915 (or 7199913 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The square root of 28799644 is about 5366.5299775553. The cubic root of 28799644 is about 306.5225099607.

The spelling of 28799644 in words is "twenty-eight million, seven hundred ninety-nine thousand, six hundred forty-four".