1065939888 has 80 divisors (see below), whose sum is σ = 2970191840. Its totient is φ = 327462912.

The previous prime is 1065939883. The next prime is 1065939907. The reversal of 1065939888 is 8889395601.

It is a super-2 number, since 2×1065939888² = 2272455689658905088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1065939883) 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 15 ways as a sum of consecutive naturals, for example, 628770 + ... + 630462.

It is an arithmetic number, because the mean of its divisors is an integer number (37127398).

Almost surely, 2^1065939888 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 1065939888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1485095920).

1065939888 is an abundant number, since it is smaller than the sum of its proper divisors (1904251952).

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

1065939888 is a wasteful number, since it uses less digits than its factorization.

1065939888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2726 (or 2720 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 57.

The square root of 1065939888 is about 32648.7348606343. The cubic root of 1065939888 is about 1021.5137999055.

The spelling of 1065939888 in words is "one billion, sixty-five million, nine hundred thirty-nine thousand, eight hundred eighty-eight".