142444224 has 224 divisors, whose sum is σ = 478779840. Its totient is φ = 41140224.

The previous prime is 142444213. The next prime is 142444249. The reversal of 142444224 is 422444241.

142444224 = 2³ + 3³ + ... + 154³.

It is a Cunningham number, because it is equal to 11935²-1.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 381702 + ... + 382074.

It is an arithmetic number, because the mean of its divisors is an integer number (2137410).

Almost surely, 2^142444224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142444224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239389920).

142444224 is an abundant number, since it is smaller than the sum of its proper divisors (336335616).

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

142444224 is a wasteful number, since it uses less digits than its factorization.

142444224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 408 counting only the distinct ones).

The product of its digits is 8192, while the sum is 27.

The square root of 142444224 is about 11934.9999581064. Note that the first 4 decimals coincide. The cubic root of 142444224 is about 522.2538070798.

Adding to 142444224 its reverse (422444241), we get a palindrome (564888465).

The spelling of 142444224 in words is "one hundred forty-two million, four hundred forty-four thousand, two hundred twenty-four".