268531220 has 24 divisors (see below), whose sum is σ = 564254208. Its totient is φ = 107348000.

The previous prime is 268531189. The next prime is 268531223. The reversal of 268531220 is 22135862.

It is a super-2 number, since 2×268531220² = 144218032229376800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268531223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44165 + ... + 49875.

It is an arithmetic number, because the mean of its divisors is an integer number (23510592).

Almost surely, 2^268531220 is an apocalyptic number.

268531220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

268531220 is an abundant number, since it is smaller than the sum of its proper divisors (295722988).

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

268531220 is a wasteful number, since it uses less digits than its factorization.

268531220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8071 (or 8069 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 268531220 is about 16386.9222247498. The cubic root of 268531220 is about 645.1562788595.

The spelling of 268531220 in words is "two hundred sixty-eight million, five hundred thirty-one thousand, two hundred twenty".