142643268 has 60 divisors (see below), whose sum is σ = 378520912. Its totient is φ = 46830960.

The previous prime is 142643239. The next prime is 142643287. The reversal of 142643268 is 862346241.

142643268 is a `hidden beast` number, since 1 + 4 + 2 + 643 + 2 + 6 + 8 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18423 + ... + 24993.

Almost surely, 2^142643268 is an apocalyptic number.

142643268 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 142643268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189260456).

142643268 is an abundant number, since it is smaller than the sum of its proper divisors (235877644).

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

142643268 is a wasteful number, since it uses less digits than its factorization.

142643268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6654 (or 6643 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 142643268 is about 11943.3357149500. The cubic root of 142643268 is about 522.4969504488.

The spelling of 142643268 in words is "one hundred forty-two million, six hundred forty-three thousand, two hundred sixty-eight".