28653816 has 16 divisors (see below), whose sum is σ = 71634600. Its totient is φ = 9551264.

The previous prime is 28653809. The next prime is 28653829. The reversal of 28653816 is 61835682.

It is a happy number.

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, 596931 + ... + 596978.

Almost surely, 2^28653816 is an apocalyptic number.

It is an amenable number.

28653816 is an abundant number, since it is smaller than the sum of its proper divisors (42980784).

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

28653816 is a wasteful number, since it uses less digits than its factorization.

28653816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193918 (or 1193914 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 28653816 is about 5352.9259288729. The cubic root of 28653816 is about 306.0042718016.

The spelling of 28653816 in words is "twenty-eight million, six hundred fifty-three thousand, eight hundred sixteen".