1142188816 has 40 divisors (see below), whose sum is σ = 2287463960. Its totient is φ = 552075264.

The previous prime is 1142188811. The next prime is 1142188891. The reversal of 1142188816 is 6188812411.

It can be written as a sum of positive squares in 4 ways, for example, as 450288400 + 691900416 = 21220^2 + 26304^2 .

It is not an unprimeable number, because it can be changed into a prime (1142188811) 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, 86800 + ... + 99088.

It is an arithmetic number, because the mean of its divisors is an integer number (57186599).

Almost surely, 2^1142188816 is an apocalyptic number.

1142188816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1142188816 is an abundant number, since it is smaller than the sum of its proper divisors (1145275144).

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

1142188816 is a wasteful number, since it uses less digits than its factorization.

1142188816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12491 (or 12485 counting only the distinct ones).

The product of its digits is 24576, while the sum is 40.

The square root of 1142188816 is about 33796.2840560911. The cubic root of 1142188816 is about 1045.3120763861.

The spelling of 1142188816 in words is "one billion, one hundred forty-two million, one hundred eighty-eight thousand, eight hundred sixteen".