28965680 has 40 divisors (see below), whose sum is σ = 68995584. Its totient is φ = 11302400.

The previous prime is 28965679. The next prime is 28965683. The reversal of 28965680 is 8656982.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28965683) 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, 1136 + ... + 7695.

Almost surely, 2^28965680 is an apocalyptic number.

28965680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28965680 is an abundant number, since it is smaller than the sum of its proper divisors (40029904).

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

28965680 is a wasteful number, since it uses less digits than its factorization.

28965680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8885 (or 8879 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 28965680 is about 5381.9773317992. The cubic root of 28965680 is about 307.1104371251.

The spelling of 28965680 in words is "twenty-eight million, nine hundred sixty-five thousand, six hundred eighty".