142304220 has 144 divisors (see below), whose sum is σ = 463095360. Its totient is φ = 35278848.

The previous prime is 142304209. The next prime is 142304221. The reversal of 142304220 is 22403241.

142304220 is a `hidden beast` number, since 14 + 230 + 422 + 0 = 666.

It is a super-3 number, since 3×142304220³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 142304193 and 142304202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142304221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 152716 + ... + 153644.

It is an arithmetic number, because the mean of its divisors is an integer number (3215940).

Almost surely, 2^142304220 is an apocalyptic number.

142304220 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 142304220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231547680).

142304220 is an abundant number, since it is smaller than the sum of its proper divisors (320791140).

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

142304220 is a wasteful number, since it uses less digits than its factorization.

142304220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004 (or 999 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 142304220 is about 11929.1332459655. The cubic root of 142304220 is about 522.0826486478.

Adding to 142304220 its reverse (22403241), we get a palindrome (164707461).

The spelling of 142304220 in words is "one hundred forty-two million, three hundred four thousand, two hundred twenty".