142439508 has 36 divisors (see below), whose sum is σ = 362453728. Its totient is φ = 47163600.

The previous prime is 142439501. The next prime is 142439509. The reversal of 142439508 is 805934241.

142439508 is a `hidden beast` number, since 142 + 4 + 3 + 9 + 508 = 666.

142439508 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

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 (142439501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7666 + ... + 18537.

Almost surely, 2^142439508 is an apocalyptic number.

142439508 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

142439508 is an abundant number, since it is smaller than the sum of its proper divisors (220014220).

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

142439508 is a wasteful number, since it uses less digits than its factorization.

142439508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26364 (or 26359 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 142439508 is about 11934.8023862987. The cubic root of 142439508 is about 522.2480434762.

The spelling of 142439508 in words is "one hundred forty-two million, four hundred thirty-nine thousand, five hundred eight".