281802240 has 280 divisors, whose sum is σ = 1019742768. Its totient is φ = 74649600.

The previous prime is 281802223. The next prime is 281802247. The reversal of 281802240 is 42208182.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281802247) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1866165 + ... + 1866315.

Almost surely, 2^281802240 is an apocalyptic number.

281802240 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 281802240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (509871384).

281802240 is an abundant number, since it is smaller than the sum of its proper divisors (737940528).

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

281802240 is an frugal number, since it uses more digits than its factorization.

281802240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 281802240 is about 16786.9663727548. The cubic root of 281802240 is about 655.6138913689.

The spelling of 281802240 in words is "two hundred eighty-one million, eight hundred two thousand, two hundred forty".