142838784 has 132 divisors (see below), whose sum is σ = 450258120. Its totient is φ = 43253760.

The previous prime is 142838783. The next prime is 142838791. The reversal of 142838784 is 487838241.

It is a tau number, because it is divible by the number of its divisors (132).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142838783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100672 + ... + 102080.

Almost surely, 2^142838784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142838784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225129060).

142838784 is an abundant number, since it is smaller than the sum of its proper divisors (307419336).

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

142838784 is a wasteful number, since it uses less digits than its factorization.

142838784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446 (or 1425 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 142838784 is about 11951.5180625726. The cubic root of 142838784 is about 522.7355640584.

The spelling of 142838784 in words is "one hundred forty-two million, eight hundred thirty-eight thousand, seven hundred eighty-four".