142806438 has 24 divisors (see below), whose sum is σ = 311468976. Its totient is φ = 47286000.

The previous prime is 142806437. The next prime is 142806439. The reversal of 142806438 is 834608241.

142806438 is a `hidden beast` number, since 1 + 4 + 2 + 8 + 0 + 643 + 8 = 666.

142806438 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (142806437) and next prime (142806439).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142806437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23553 + ... + 28988.

It is an arithmetic number, because the mean of its divisors is an integer number (12977874).

Almost surely, 2^142806438 is an apocalyptic number.

142806438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

142806438 is an abundant number, since it is smaller than the sum of its proper divisors (168662538).

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

142806438 is a wasteful number, since it uses less digits than its factorization.

142806438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52700 (or 52697 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 142806438 is about 11950.1647687385. The cubic root of 142806438 is about 522.6961030648.

The spelling of 142806438 in words is "one hundred forty-two million, eight hundred six thousand, four hundred thirty-eight".