1142279388 has 48 divisors (see below), whose sum is σ = 2966130720. Its totient is φ = 380160000.

The previous prime is 1142279381. The next prime is 1142279389. The reversal of 1142279388 is 8839722411.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142279381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63388 + ... + 79388.

It is an arithmetic number, because the mean of its divisors is an integer number (61794390).

Almost surely, 2^1142279388 is an apocalyptic number.

1142279388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1142279388 is an abundant number, since it is smaller than the sum of its proper divisors (1823851332).

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

1142279388 is a wasteful number, since it uses less digits than its factorization.

1142279388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16675 (or 16667 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 1142279388 is about 33797.6239993287. The cubic root of 1142279388 is about 1045.3397056484.

The spelling of 1142279388 in words is "one billion, one hundred forty-two million, two hundred seventy-nine thousand, three hundred eighty-eight".