28747644 has 24 divisors (see below), whose sum is σ = 68506368. Its totient is φ = 9378480.

The previous prime is 28747577. The next prime is 28747651. The reversal of 28747644 is 44674782.

It is a junction number, because it is equal to n+sod(n) for n = 28747596 and 28747605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24922 + ... + 26049.

It is an arithmetic number, because the mean of its divisors is an integer number (2854432).

Almost surely, 2^28747644 is an apocalyptic number.

It is an amenable number.

28747644 is an abundant number, since it is smaller than the sum of its proper divisors (39758724).

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

28747644 is a wasteful number, since it uses less digits than its factorization.

28747644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51025 (or 51023 counting only the distinct ones).

The product of its digits is 301056, while the sum is 42.

The square root of 28747644 is about 5361.6829447479. The cubic root of 28747644 is about 306.3379153955.

The spelling of 28747644 in words is "twenty-eight million, seven hundred forty-seven thousand, six hundred forty-four".