28813736 has 16 divisors (see below), whose sum is σ = 61743840. Its totient is φ = 12348720.

The previous prime is 28813723. The next prime is 28813751. The reversal of 28813736 is 63731882.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28813736.

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, 257210 + ... + 257321.

It is an arithmetic number, because the mean of its divisors is an integer number (3858990).

Almost surely, 2^28813736 is an apocalyptic number.

It is an amenable number.

28813736 is an abundant number, since it is smaller than the sum of its proper divisors (32930104).

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

28813736 is a wasteful number, since it uses less digits than its factorization.

28813736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514544 (or 514540 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 28813736 is about 5367.8427696795. The cubic root of 28813736 is about 306.5724968156.

The spelling of 28813736 in words is "twenty-eight million, eight hundred thirteen thousand, seven hundred thirty-six".