281601340 has 48 divisors (see below), whose sum is σ = 601201440. Its totient is φ = 110781440.

The previous prime is 281601319. The next prime is 281601347. The reversal of 281601340 is 43106182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281601347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 499899 + ... + 500461.

It is an arithmetic number, because the mean of its divisors is an integer number (12525030).

Almost surely, 2^281601340 is an apocalyptic number.

281601340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281601340 is an abundant number, since it is smaller than the sum of its proper divisors (319600100).

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

281601340 is a wasteful number, since it uses less digits than its factorization.

281601340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942 (or 940 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 281601340 is about 16780.9814969209. The cubic root of 281601340 is about 655.4580561479.

The spelling of 281601340 in words is "two hundred eighty-one million, six hundred one thousand, three hundred forty".