65633928 has 32 divisors (see below), whose sum is σ = 167184000. Its totient is φ = 21464768.

The previous prime is 65633921. The next prime is 65633933. The reversal of 65633928 is 82933656.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 65633928.

It is not an unprimeable number, because it can be changed into a prime (65633921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24528 + ... + 27071.

It is an arithmetic number, because the mean of its divisors is an integer number (5224500).

Almost surely, 2^65633928 is an apocalyptic number.

It is an amenable number.

65633928 is an abundant number, since it is smaller than the sum of its proper divisors (101550072).

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

65633928 is a wasteful number, since it uses less digits than its factorization.

65633928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51661 (or 51657 counting only the distinct ones).

The product of its digits is 233280, while the sum is 42.

The square root of 65633928 is about 8101.4769023926. The cubic root of 65633928 is about 403.3754523477.

The spelling of 65633928 in words is "sixty-five million, six hundred thirty-three thousand, nine hundred twenty-eight".