281183140 has 96 divisors (see below), whose sum is σ = 696213504. Its totient is φ = 93398400.

The previous prime is 281183137. The next prime is 281183183. The reversal of 281183140 is 41381182.

281183140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 281183099 and 281183108.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 993439 + ... + 993721.

It is an arithmetic number, because the mean of its divisors is an integer number (7252224).

Almost surely, 2^281183140 is an apocalyptic number.

281183140 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 281183140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (348106752).

281183140 is an abundant number, since it is smaller than the sum of its proper divisors (415030364).

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

281183140 is a wasteful number, since it uses less digits than its factorization.

281183140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 281183140 is about 16768.5163326992. The cubic root of 281183140 is about 655.1334265800.

The spelling of 281183140 in words is "two hundred eighty-one million, one hundred eighty-three thousand, one hundred forty".