281223936 has 324 divisors, whose sum is σ = 981463392. Its totient is φ = 77156352.

The previous prime is 281223893. The next prime is 281223949. The reversal of 281223936 is 639322182.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 281223936.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5306086 + ... + 5306138.

It is an arithmetic number, because the mean of its divisors is an integer number (3029208).

Almost surely, 2^281223936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281223936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (490731696).

281223936 is an abundant number, since it is smaller than the sum of its proper divisors (700239456).

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

281223936 is a wasteful number, since it uses less digits than its factorization.

281223936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 112 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 281223936 is about 16769.7327349007. The cubic root of 281223936 is about 655.1651088148.

The spelling of 281223936 in words is "two hundred eighty-one million, two hundred twenty-three thousand, nine hundred thirty-six".