814421718 has 72 divisors (see below), whose sum is σ = 1951349400. Its totient is φ = 245298240.

The previous prime is 814421693. The next prime is 814421723. The reversal of 814421718 is 817124418.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 388818 + ... + 390906.

It is an arithmetic number, because the mean of its divisors is an integer number (27102075).

Almost surely, 2^814421718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 814421718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (975674700).

814421718 is an abundant number, since it is smaller than the sum of its proper divisors (1136927682).

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

814421718 is a wasteful number, since it uses less digits than its factorization.

814421718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2298 (or 2284 counting only the distinct ones).

The product of its digits is 14336, while the sum is 36.

The square root of 814421718 is about 28538.0748825144. The cubic root of 814421718 is about 933.8628852302.

The spelling of 814421718 in words is "eight hundred fourteen million, four hundred twenty-one thousand, seven hundred eighteen".