281438634 has 8 divisors (see below), whose sum is σ = 562877280. Its totient is φ = 93812876.

The previous prime is 281438617. The next prime is 281438653. The reversal of 281438634 is 436834182.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

281438634 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 281438592 and 281438601.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 23453214 + ... + 23453225.

It is an arithmetic number, because the mean of its divisors is an integer number (70359660).

Almost surely, 2^281438634 is an apocalyptic number.

281438634 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

281438634 is a wasteful number, since it uses less digits than its factorization.

281438634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46906444.

The product of its digits is 110592, while the sum is 39.

The square root of 281438634 is about 16776.1328678572. The cubic root of 281438634 is about 655.3317931303.

The spelling of 281438634 in words is "two hundred eighty-one million, four hundred thirty-eight thousand, six hundred thirty-four".