142889544 has 48 divisors (see below), whose sum is σ = 442278720. Its totient is φ = 40825440.

The previous prime is 142889521. The next prime is 142889561. The reversal of 142889544 is 445988241.

142889544 is a `hidden beast` number, since 1 + 4 + 28 + 89 + 544 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 142889544.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141252 + ... + 142259.

It is an arithmetic number, because the mean of its divisors is an integer number (9214140).

Almost surely, 2^142889544 is an apocalyptic number.

142889544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

142889544 is an abundant number, since it is smaller than the sum of its proper divisors (299389176).

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

142889544 is a wasteful number, since it uses less digits than its factorization.

142889544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283530 (or 283523 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 142889544 is about 11953.6414535488. The cubic root of 142889544 is about 522.7974774828.

It can be divided in two parts, 14288 and 9544, that added together give a palindrome (23832).

The spelling of 142889544 in words is "one hundred forty-two million, eight hundred eighty-nine thousand, five hundred forty-four".