142432440 has 32 divisors (see below), whose sum is σ = 427297680. Its totient is φ = 37981952.

The previous prime is 142432429. The next prime is 142432471. The reversal of 142432440 is 44234241.

It is a happy number.

142432440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 142432440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 593349 + ... + 593588.

Almost surely, 2^142432440 is an apocalyptic number.

142432440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142432440 is an abundant number, since it is smaller than the sum of its proper divisors (284865240).

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

142432440 is a wasteful number, since it uses less digits than its factorization.

142432440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186951 (or 1186947 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 142432440 is about 11934.5062738263. The cubic root of 142432440 is about 522.2394051654.

Adding to 142432440 its reverse (44234241), we get a palindrome (186666681).

The spelling of 142432440 in words is "one hundred forty-two million, four hundred thirty-two thousand, four hundred forty".