142220344 has 48 divisors (see below), whose sum is σ = 311267880. Its totient is φ = 60742080.

The previous prime is 142220329. The next prime is 142220347. The reversal of 142220344 is 443022241.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142220347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180319 + ... + 181105.

Almost surely, 2^142220344 is an apocalyptic number.

142220344 is a gapful number since it is divisible by the number (14) 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 142220344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155633940).

142220344 is an abundant number, since it is smaller than the sum of its proper divisors (169047536).

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

142220344 is a wasteful number, since it uses less digits than its factorization.

142220344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268 (or 1257 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 142220344 is about 11925.6171328783. The cubic root of 142220344 is about 521.9800543359.

Adding to 142220344 its reverse (443022241), we get a palindrome (585242585).

The spelling of 142220344 in words is "one hundred forty-two million, two hundred twenty thousand, three hundred forty-four".