1142809668 has 432 divisors, whose sum is σ = 4141683840. Its totient is φ = 265161600.

The previous prime is 1142809651. The next prime is 1142809673. The reversal of 1142809668 is 8669082411.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 36864813 + ... + 36864843.

Almost surely, 2^1142809668 is an apocalyptic number.

1142809668 is a gapful number since it is divisible by the number (18) 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 1142809668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2070841920).

1142809668 is an abundant number, since it is smaller than the sum of its proper divisors (2998874172).

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

1142809668 is a wasteful number, since it uses less digits than its factorization.

1142809668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1142809668 is about 33805.4680192421. The cubic root of 1142809668 is about 1045.5014398643.

The spelling of 1142809668 in words is "one billion, one hundred forty-two million, eight hundred nine thousand, six hundred sixty-eight".