280323120 has 360 divisors, whose sum is σ = 1116772272. Its totient is φ = 57953280.

The previous prime is 280323119. The next prime is 280323133. The reversal of 280323120 is 21323082.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1422862 + ... + 1423058.

Almost surely, 2^280323120 is an apocalyptic number.

280323120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280323120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (558386136).

280323120 is an abundant number, since it is smaller than the sum of its proper divisors (836449152).

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

280323120 is a wasteful number, since it uses less digits than its factorization.

280323120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 280323120 is about 16742.8528035099. The cubic root of 280323120 is about 654.4648193316.

The spelling of 280323120 in words is "two hundred eighty million, three hundred twenty-three thousand, one hundred twenty".