28310780 has 24 divisors (see below), whose sum is σ = 62950608. Its totient is φ = 10658048.

The previous prime is 28310767. The next prime is 28310837. The reversal of 28310780 is 8701382.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41294 + ... + 41973.

It is an arithmetic number, because the mean of its divisors is an integer number (2622942).

Almost surely, 2^28310780 is an apocalyptic number.

28310780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28310780 is an abundant number, since it is smaller than the sum of its proper divisors (34639828).

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

28310780 is a wasteful number, since it uses less digits than its factorization.

28310780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83293 (or 83291 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 28310780 is about 5320.7875356943. The cubic root of 28310780 is about 304.7782316944.

The spelling of 28310780 in words is "twenty-eight million, three hundred ten thousand, seven hundred eighty".