281272266 has 48 divisors (see below), whose sum is σ = 668292768. Its totient is φ = 84789600.

The previous prime is 281272237. The next prime is 281272273. The reversal of 281272266 is 662272182.

It is a super-2 number, since 2×281272266² = 158228175241549512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 281272266.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35401 + ... + 42611.

It is an arithmetic number, because the mean of its divisors is an integer number (13922766).

Almost surely, 2^281272266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281272266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334146384).

281272266 is an abundant number, since it is smaller than the sum of its proper divisors (387020502).

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

281272266 is a wasteful number, since it uses less digits than its factorization.

281272266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7427 (or 7424 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 281272266 is about 16771.1736619713. The cubic root of 281272266 is about 655.2026380005.

It can be divided in two parts, 2812 and 72266, that added together give a triangular number (75078 = T₃₈₇).

The spelling of 281272266 in words is "two hundred eighty-one million, two hundred seventy-two thousand, two hundred sixty-six".