1068187720 has 32 divisors (see below), whose sum is σ = 2404737720. Its totient is φ = 427041280.

The previous prime is 1068187717. The next prime is 1068187721. The reversal of 1068187720 is 277818601.

It can be written as a sum of positive squares in 4 ways, for example, as 1061847396 + 6340324 = 32586^2 + 2518^2 .

It is a super-2 number, since 2×1068187720² = 2282050010317596800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (1068187721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79404 + ... + 91876.

Almost surely, 2^1068187720 is an apocalyptic number.

1068187720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1068187720 is an abundant number, since it is smaller than the sum of its proper divisors (1336550000).

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

1068187720 is a wasteful number, since it uses less digits than its factorization.

1068187720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14625 (or 14621 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 1068187720 is about 32683.1412199011. The cubic root of 1068187720 is about 1022.2313448216.

The spelling of 1068187720 in words is "one billion, sixty-eight million, one hundred eighty-seven thousand, seven hundred twenty".