1069391680 has 112 divisors (see below), whose sum is σ = 2969971200. Its totient is φ = 366610944.

The previous prime is 1069391669. The next prime is 1069391683. The reversal of 1069391680 is 861939601.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×1069391680² = 2287197130506444800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1069391683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104889 + ... + 114631.

It is an arithmetic number, because the mean of its divisors is an integer number (26517600).

Almost surely, 2^1069391680 is an apocalyptic number.

1069391680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1069391680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1484985600).

1069391680 is an abundant number, since it is smaller than the sum of its proper divisors (1900579520).

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

1069391680 is an frugal number, since it uses more digits than its factorization.

1069391680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9781 (or 9757 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 1069391680 is about 32701.5547031024. The cubic root of 1069391680 is about 1022.6152547313.

The spelling of 1069391680 in words is "one billion, sixty-nine million, three hundred ninety-one thousand, six hundred eighty".