142220988 has 192 divisors, whose sum is σ = 470400000. Its totient is φ = 36142848.

The previous prime is 142220971. The next prime is 142220989. The reversal of 142220988 is 889022241.

It is a super-2 number, since 2×142220988² = 40453618855392288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142220989) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 284763 + ... + 285261.

It is an arithmetic number, because the mean of its divisors is an integer number (2450000).

Almost surely, 2^142220988 is an apocalyptic number.

142220988 is a gapful number since it is divisible by the number (18) 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 142220988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235200000).

142220988 is an abundant number, since it is smaller than the sum of its proper divisors (328179012).

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

142220988 is a wasteful number, since it uses less digits than its factorization.

142220988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 142220988 is about 11925.6441335468. The cubic root of 142220988 is about 521.9808422088.

The spelling of 142220988 in words is "one hundred forty-two million, two hundred twenty thousand, nine hundred eighty-eight".