818890842 has 96 divisors (see below), whose sum is σ = 2187924480. Its totient is φ = 201489120.

The previous prime is 818890841. The next prime is 818890903. The reversal of 818890842 is 248098818.

It is a super-2 number, since 2×818890842² = 1341164422222937928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 818890791 and 818890800.

It is not an unprimeable number, because it can be changed into a prime (818890841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54783 + ... + 68109.

It is an arithmetic number, because the mean of its divisors is an integer number (22790880).

Almost surely, 2^818890842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818890842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1093962240).

818890842 is an abundant number, since it is smaller than the sum of its proper divisors (1369033638).

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

818890842 is a wasteful number, since it uses less digits than its factorization.

818890842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13376 (or 13369 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 48.

The square root of 818890842 is about 28616.2688343536. The cubic root of 818890842 is about 935.5679552362.

The spelling of 818890842 in words is "eight hundred eighteen million, eight hundred ninety thousand, eight hundred forty-two".