28244780 has 12 divisors (see below), whose sum is σ = 59314080. Its totient is φ = 11297904.

The previous prime is 28244767. The next prime is 28244809. The reversal of 28244780 is 8744282.

28244780 is nontrivially palindromic in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 28244780.

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, 706100 + ... + 706139.

It is an arithmetic number, because the mean of its divisors is an integer number (4942840).

Almost surely, 2^28244780 is an apocalyptic number.

28244780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28244780 is an abundant number, since it is smaller than the sum of its proper divisors (31069300).

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

28244780 is a wasteful number, since it uses less digits than its factorization.

28244780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412248 (or 1412246 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 28244780 is about 5314.5818273877. The cubic root of 28244780 is about 304.5412075526.

The spelling of 28244780 in words is "twenty-eight million, two hundred forty-four thousand, seven hundred eighty".