1068191140 has 24 divisors (see below), whose sum is σ = 2243921400. Its totient is φ = 427139328.

The previous prime is 1068191129. The next prime is 1068191143. The reversal of 1068191140 is 411918601.

It can be written as a sum of positive squares in 4 ways, for example, as 101727396 + 966463744 = 10086^2 + 31088^2 .

It is a super-2 number, since 2×1068191140² = 2282064623148999200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1068191143) 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, 75336 + ... + 88384.

It is an arithmetic number, because the mean of its divisors is an integer number (93496725).

Almost surely, 2^1068191140 is an apocalyptic number.

1068191140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1068191140 is an abundant number, since it is smaller than the sum of its proper divisors (1175730260).

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

1068191140 is a wasteful number, since it uses less digits than its factorization.

1068191140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17151 (or 17149 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 1068191140 is about 32683.1935404116. The cubic root of 1068191140 is about 1022.2324357745.

The spelling of 1068191140 in words is "one billion, sixty-eight million, one hundred ninety-one thousand, one hundred forty".