8281638 has 12 divisors (see below), whose sum is σ = 17943588. Its totient is φ = 2760540.

The previous prime is 8281597. The next prime is 8281639. The reversal of 8281638 is 8361828.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8281639) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 230028 + ... + 230063.

It is an arithmetic number, because the mean of its divisors is an integer number (1495299).

Almost surely, 2^8281638 is an apocalyptic number.

8281638 is an abundant number, since it is smaller than the sum of its proper divisors (9661950).

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

8281638 is a wasteful number, since it uses less digits than its factorization.

8281638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460099 (or 460096 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 8281638 is about 2877.7835220878. The cubic root of 8281638 is about 202.3199680198.

The spelling of 8281638 in words is "eight million, two hundred eighty-one thousand, six hundred thirty-eight".