142444620 has 72 divisors (see below), whose sum is σ = 434594160. Its totient is φ = 37764480.

The previous prime is 142444609. The next prime is 142444637. The reversal of 142444620 is 26444241.

It is a happy number.

142444620 is a `hidden beast` number, since 14 + 24 + 4 + 4 + 620 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30010 + ... + 34430.

It is an arithmetic number, because the mean of its divisors is an integer number (6036030).

Almost surely, 2^142444620 is an apocalyptic number.

142444620 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 142444620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217297080).

142444620 is an abundant number, since it is smaller than the sum of its proper divisors (292149540).

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

142444620 is a wasteful number, since it uses less digits than its factorization.

142444620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4615 (or 4610 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 142444620 is about 11935.0165479567. The cubic root of 142444620 is about 522.2542910407.

Adding to 142444620 its reverse (26444241), we get a palindrome (168888861).

The spelling of 142444620 in words is "one hundred forty-two million, four hundred forty-four thousand, six hundred twenty".