239997280 has 48 divisors (see below), whose sum is σ = 570855600. Its totient is φ = 95345152.

The previous prime is 239997271. The next prime is 239997299. The reversal of 239997280 is 82799932.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 18807 + ... + 28873.

It is an arithmetic number, because the mean of its divisors is an integer number (11892825).

Almost surely, 2^239997280 is an apocalyptic number.

239997280 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 239997280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285427800).

239997280 is an abundant number, since it is smaller than the sum of its proper divisors (330858320).

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

239997280 is a wasteful number, since it uses less digits than its factorization.

239997280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10231 (or 10223 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 239997280 is about 15491.8455969584. The cubic root of 239997280 is about 621.4441534951. Note that the first 3 decimals are identical.

The spelling of 239997280 in words is "two hundred thirty-nine million, nine hundred ninety-seven thousand, two hundred eighty".