28733616 has 50 divisors (see below), whose sum is σ = 83167172. Its totient is φ = 9577440.

The previous prime is 28733611. The next prime is 28733633. The reversal of 28733616 is 61633782.

It is a happy number.

28733616 is a `hidden beast` number, since 2 + 8 + 7 + 33 + 616 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (28733611) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9790 + ... + 12381.

Almost surely, 2^28733616 is an apocalyptic number.

It is an amenable number.

28733616 is an abundant number, since it is smaller than the sum of its proper divisors (54433556).

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

28733616 is a wasteful number, since it uses less digits than its factorization.

28733616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22191 (or 22176 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 28733616 is about 5360.3746137747. The cubic root of 28733616 is about 306.2880793411.

The spelling of 28733616 in words is "twenty-eight million, seven hundred thirty-three thousand, six hundred sixteen".