281672340 has 96 divisors (see below), whose sum is σ = 834839040. Its totient is φ = 70761600.

The previous prime is 281672333. The next prime is 281672357. The reversal of 281672340 is 43276182.

It is a congruent number.

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, 239955 + ... + 241125.

It is an arithmetic number, because the mean of its divisors is an integer number (8696240).

Almost surely, 2^281672340 is an apocalyptic number.

281672340 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 281672340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (417419520).

281672340 is an abundant number, since it is smaller than the sum of its proper divisors (553166700).

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

281672340 is a wasteful number, since it uses less digits than its factorization.

281672340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413 (or 1411 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 281672340 is about 16783.0968536799. The cubic root of 281672340 is about 655.5131382856.

The spelling of 281672340 in words is "two hundred eighty-one million, six hundred seventy-two thousand, three hundred forty".