142244440 has 64 divisors (see below), whose sum is σ = 364966560. Its totient is φ = 49428480.

The previous prime is 142244411. The next prime is 142244483. The reversal of 142244440 is 44442241.

142244440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 795 + ... + 16885.

Almost surely, 2^142244440 is an apocalyptic number.

142244440 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 142244440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182483280).

142244440 is an abundant number, since it is smaller than the sum of its proper divisors (222722120).

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

142244440 is a wasteful number, since it uses less digits than its factorization.

142244440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16132 (or 16128 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 142244440 is about 11926.6273522736. The cubic root of 142244440 is about 522.0095318841.

Adding to 142244440 its reverse (44442241), we get a palindrome (186686681).

The spelling of 142244440 in words is "one hundred forty-two million, two hundred forty-four thousand, four hundred forty".