818306742 has 64 divisors (see below), whose sum is σ = 1868106240. Its totient is φ = 236544000.

The previous prime is 818306701. The next prime is 818306743. The reversal of 818306742 is 247603818.

It is a self number, because there is not a number n which added to its sum of digits gives 818306742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818306743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1063734 + ... + 1064502.

It is an arithmetic number, because the mean of its divisors is an integer number (29189160).

Almost surely, 2^818306742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818306742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (934053120).

818306742 is an abundant number, since it is smaller than the sum of its proper divisors (1049799498).

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

818306742 is a wasteful number, since it uses less digits than its factorization.

818306742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 818306742 is about 28606.0612807845. The cubic root of 818306742 is about 935.3454611039.

The spelling of 818306742 in words is "eight hundred eighteen million, three hundred six thousand, seven hundred forty-two".