28824978 has 96 divisors (see below), whose sum is σ = 74207232. Its totient is φ = 7300800.

The previous prime is 28824953. The next prime is 28825031. The reversal of 28824978 is 87942882.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 219973 + ... + 220103.

It is an arithmetic number, because the mean of its divisors is an integer number (772992).

Almost surely, 2^28824978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28824978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37103616).

28824978 is an abundant number, since it is smaller than the sum of its proper divisors (45382254).

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

28824978 is a wasteful number, since it uses less digits than its factorization.

28824978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 187 counting only the distinct ones).

The product of its digits is 516096, while the sum is 48.

The square root of 28824978 is about 5368.8898293781. The cubic root of 28824978 is about 306.6123625227.

The spelling of 28824978 in words is "twenty-eight million, eight hundred twenty-four thousand, nine hundred seventy-eight".