28965800 has 24 divisors (see below), whose sum is σ = 67345950. Its totient is φ = 11586240.

The previous prime is 28965791. The next prime is 28965821. The reversal of 28965800 is 856982.

It can be written as a sum of positive squares in 3 ways, for example, as 17255716 + 11710084 = 4154^2 + 3422^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72215 + ... + 72614.

Almost surely, 2^28965800 is an apocalyptic number.

28965800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28965800 is an abundant number, since it is smaller than the sum of its proper divisors (38380150).

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

28965800 is a wasteful number, since it uses less digits than its factorization.

28965800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144845 (or 144836 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 28965800 is about 5381.9884801066. The cubic root of 28965800 is about 307.1108612270.

The spelling of 28965800 in words is "twenty-eight million, nine hundred sixty-five thousand, eight hundred".