961818 has 64 divisors (see below), whose sum is σ = 2419200. Its totient is φ = 250560.

The previous prime is 961817. The next prime is 961841. The reversal of 961818 is 818169.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an alternating number because its digits alternate between odd and even.

961818 is a modest number, since divided by 1818 gives 96 as remainder.

It is not an unprimeable number, because it can be changed into a prime (961811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16273 + ... + 16331.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2⁹⁶¹⁸¹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 961818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1209600).

961818 is an abundant number, since it is smaller than the sum of its proper divisors (1457382).

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

961818 is a wasteful number, since it uses less digits than its factorization.

961818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107.

The product of its digits is 3456, while the sum is 33.

The square root of 961818 is about 980.7232025398. The cubic root of 961818 is about 98.7107155603.

The spelling of 961818 in words is "nine hundred sixty-one thousand, eight hundred eighteen".