818442534 has 64 divisors (see below), whose sum is σ = 2102252544. Its totient is φ = 206464896.

The previous prime is 818442529. The next prime is 818442539. The reversal of 818442534 is 435244818.

It is an interprime number because it is at equal distance from previous prime (818442529) and next prime (818442539).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 818442492 and 818442501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818442539) 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, 20029 + ... + 45144.

It is an arithmetic number, because the mean of its divisors is an integer number (32847696).

Almost surely, 2^818442534 is an apocalyptic number.

818442534 is an abundant number, since it is smaller than the sum of its proper divisors (1283810010).

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

818442534 is a wasteful number, since it uses less digits than its factorization.

818442534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65221.

The product of its digits is 122880, while the sum is 39.

The square root of 818442534 is about 28608.4346653220. The cubic root of 818442534 is about 935.3971961479.

The spelling of 818442534 in words is "eight hundred eighteen million, four hundred forty-two thousand, five hundred thirty-four".