142204440 has 256 divisors, whose sum is σ = 519045120. Its totient is φ = 30481920.

The previous prime is 142204421. The next prime is 142204451. The reversal of 142204440 is 44402241.

142204440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1119657 + ... + 1119783.

It is an arithmetic number, because the mean of its divisors is an integer number (2027520).

Almost surely, 2^142204440 is an apocalyptic number.

142204440 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 142204440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259522560).

142204440 is an abundant number, since it is smaller than the sum of its proper divisors (376840680).

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

142204440 is a wasteful number, since it uses less digits than its factorization.

142204440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 142204440 is about 11924.9503143619. The cubic root of 142204440 is about 521.9605965471.

Adding to 142204440 its reverse (44402241), we get a palindrome (186606681).

The spelling of 142204440 in words is "one hundred forty-two million, two hundred four thousand, four hundred forty".