142440030 has 48 divisors (see below), whose sum is σ = 371492784. Its totient is φ = 37866240.

The previous prime is 142440013. The next prime is 142440031. The reversal of 142440030 is 30044241.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 142439985 and 142440012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142440031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28950 + ... + 33510.

It is an arithmetic number, because the mean of its divisors is an integer number (7739433).

Almost surely, 2^142440030 is an apocalyptic number.

142440030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142440030 is an abundant number, since it is smaller than the sum of its proper divisors (229052754).

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

142440030 is a wasteful number, since it uses less digits than its factorization.

142440030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4921 (or 4918 counting only the distinct ones).

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

The square root of 142440030 is about 11934.8242550948. The cubic root of 142440030 is about 522.2486814386.

Adding to 142440030 its reverse (30044241), we get a palindrome (172484271).

The spelling of 142440030 in words is "one hundred forty-two million, four hundred forty thousand, thirty".