142222938 has 64 divisors (see below), whose sum is σ = 348751872. Its totient is φ = 38047680.

The previous prime is 142222937. The next prime is 142222943. The reversal of 142222938 is 839222241.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 142222899 and 142222908.

It is not an unprimeable number, because it can be changed into a prime (142222937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16131 + ... + 23337.

It is an arithmetic number, because the mean of its divisors is an integer number (5449248).

Almost surely, 2^142222938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142222938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174375936).

142222938 is an abundant number, since it is smaller than the sum of its proper divisors (206528934).

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

142222938 is a wasteful number, since it uses less digits than its factorization.

142222938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7259.

The product of its digits is 13824, while the sum is 33.

The square root of 142222938 is about 11925.7258898568. The cubic root of 142222938 is about 521.9832278341.

The spelling of 142222938 in words is "one hundred forty-two million, two hundred twenty-two thousand, nine hundred thirty-eight".