281363140 has 48 divisors (see below), whose sum is σ = 619476480. Its totient is φ = 107141760.

The previous prime is 281363123. The next prime is 281363179. The reversal of 281363140 is 41363182.

It is a junction number, because it is equal to n+sod(n) for n = 281363099 and 281363108.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104005 + ... + 106675.

It is an arithmetic number, because the mean of its divisors is an integer number (12905760).

Almost surely, 2^281363140 is an apocalyptic number.

281363140 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 281363140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309738240).

281363140 is an abundant number, since it is smaller than the sum of its proper divisors (338113340).

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

281363140 is a wasteful number, since it uses less digits than its factorization.

281363140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932 (or 2930 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 281363140 is about 16773.8826751590. The cubic root of 281363140 is about 655.2731917909.

The spelling of 281363140 in words is "two hundred eighty-one million, three hundred sixty-three thousand, one hundred forty".