142309188 has 144 divisors (see below), whose sum is σ = 439735296. Its totient is φ = 37920960.

The previous prime is 142309171. The next prime is 142309247. The reversal of 142309188 is 881903241.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 248943 + ... + 249513.

Almost surely, 2^142309188 is an apocalyptic number.

142309188 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 142309188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219867648).

142309188 is an abundant number, since it is smaller than the sum of its proper divisors (297426108).

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

142309188 is a wasteful number, since it uses less digits than its factorization.

142309188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 142309188 is about 11929.3414738618. The cubic root of 142309188 is about 522.0887240741.

The spelling of 142309188 in words is "one hundred forty-two million, three hundred nine thousand, one hundred eighty-eight".