1081628964 has 96 divisors (see below), whose sum is σ = 3057537280. Its totient is φ = 332773920.

The previous prime is 1081628963. The next prime is 1081628983. The reversal of 1081628964 is 4698261801.

1081628964 is a `hidden beast` number, since 10 + 8 + 1 + 628 + 9 + 6 + 4 = 666.

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 not an unprimeable number, because it can be changed into a prime (1081628963) 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, 108969 + ... + 118479.

Almost surely, 2^1081628964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1081628964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1528768640).

1081628964 is an abundant number, since it is smaller than the sum of its proper divisors (1975908316).

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

1081628964 is an equidigital number, since it uses as much as digits as its factorization.

1081628964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9549 (or 9529 counting only the distinct ones).

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

The square root of 1081628964 is about 32888.1280099674. The cubic root of 1081628964 is about 1026.5011402244.

The spelling of 1081628964 in words is "one billion, eighty-one million, six hundred twenty-eight thousand, nine hundred sixty-four".