1142312868 has 36 divisors (see below), whose sum is σ = 2994460560. Its totient is φ = 380770632.

The previous prime is 1142312789. The next prime is 1142312911. The reversal of 1142312868 is 8682132411.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 586638 + ... + 588581.

It is an arithmetic number, because the mean of its divisors is an integer number (83179460).

Almost surely, 2^1142312868 is an apocalyptic number.

1142312868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1142312868 is an abundant number, since it is smaller than the sum of its proper divisors (1852147692).

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

1142312868 is a wasteful number, since it uses less digits than its factorization.

1142312868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175238 (or 1175224 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 1142312868 is about 33798.1192967893. The cubic root of 1142312868 is about 1045.3499184538.

The spelling of 1142312868 in words is "one billion, one hundred forty-two million, three hundred twelve thousand, eight hundred sixty-eight".