142022440 has 64 divisors (see below), whose sum is σ = 371433600. Its totient is φ = 47862528.

The previous prime is 142022431. The next prime is 142022497. The reversal of 142022440 is 44220241.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12222 + ... + 20818.

It is an arithmetic number, because the mean of its divisors is an integer number (5803650).

Almost surely, 2^142022440 is an apocalyptic number.

142022440 is a gapful number since it is divisible by the number (10) 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 142022440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185716800).

142022440 is an abundant number, since it is smaller than the sum of its proper divisors (229411160).

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

142022440 is a wasteful number, since it uses less digits than its factorization.

142022440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8674 (or 8670 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 142022440 is about 11917.3168121016. The cubic root of 142022440 is about 521.7378248236.

Adding to 142022440 its reverse (44220241), we get a palindrome (186242681).

The spelling of 142022440 in words is "one hundred forty-two million, twenty-two thousand, four hundred forty".