1142887638 has 8 divisors (see below), whose sum is σ = 2285775288. Its totient is φ = 380962544.

The previous prime is 1142887631. The next prime is 1142887661. The reversal of 1142887638 is 8367882411.

It is a sphenic number, since it is the product of 3 distinct primes.

1142887638 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142887631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95240631 + ... + 95240642.

It is an arithmetic number, because the mean of its divisors is an integer number (285721911).

Almost surely, 2^1142887638 is an apocalyptic number.

1142887638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1142887638 is a wasteful number, since it uses less digits than its factorization.

1142887638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190481278.

The product of its digits is 516096, while the sum is 48.

The square root of 1142887638 is about 33806.6212153773. The cubic root of 1142887638 is about 1045.5252163209.

The spelling of 1142887638 in words is "one billion, one hundred forty-two million, eight hundred eighty-seven thousand, six hundred thirty-eight".