1067720720 has 160 divisors (see below), whose sum is σ = 2869530624. Its totient is φ = 365657600.

The previous prime is 1067720681. The next prime is 1067720723. The reversal of 1067720720 is 270277601.

It is a happy number.

It is a super-2 number, since 2×1067720720² = 2280055071834636800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1067720723) 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, 1436669 + ... + 1437411.

Almost surely, 2^1067720720 is an apocalyptic number.

1067720720 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 1067720720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1434765312).

1067720720 is an abundant number, since it is smaller than the sum of its proper divisors (1801809904).

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

1067720720 is a wasteful number, since it uses less digits than its factorization.

1067720720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 855 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 32.

The square root of 1067720720 is about 32675.9960827516. The cubic root of 1067720720 is about 1022.0823536488.

The spelling of 1067720720 in words is "one billion, sixty-seven million, seven hundred twenty thousand, seven hundred twenty".