142440220 has 48 divisors (see below), whose sum is σ = 323870400. Its totient is φ = 52310016.

The previous prime is 142440217. The next prime is 142440247. The reversal of 142440220 is 22044241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50364 + ... + 53116.

It is an arithmetic number, because the mean of its divisors is an integer number (6747300).

Almost surely, 2^142440220 is an apocalyptic number.

142440220 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 142440220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161935200).

142440220 is an abundant number, since it is smaller than the sum of its proper divisors (181430180).

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

142440220 is a wasteful number, since it uses less digits than its factorization.

142440220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2974 (or 2972 counting only the distinct ones).

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

The square root of 142440220 is about 11934.8322149915. The cubic root of 142440220 is about 522.2489136467.

Adding to 142440220 its reverse (22044241), we get a palindrome (164484461).

The spelling of 142440220 in words is "one hundred forty-two million, four hundred forty thousand, two hundred twenty".