981164826 has 120 divisors (see below), whose sum is σ = 2460617280. Its totient is φ = 291351168.

The previous prime is 981164791. The next prime is 981164827. The reversal of 981164826 is 628461189.

It is a super-2 number, since 2×981164826² = 1925368831559220552, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (981164827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 888991 + ... + 890093.

It is an arithmetic number, because the mean of its divisors is an integer number (20505144).

Almost surely, 2^981164826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981164826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1230308640).

981164826 is an abundant number, since it is smaller than the sum of its proper divisors (1479452454).

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

981164826 is a wasteful number, since it uses less digits than its factorization.

981164826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170 (or 1144 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 981164826 is about 31323.5506608047. The cubic root of 981164826 is about 993.6817727456.

The spelling of 981164826 in words is "nine hundred eighty-one million, one hundred sixty-four thousand, eight hundred twenty-six".