142809808 has 40 divisors (see below), whose sum is σ = 286688000. Its totient is φ = 68843520.

The previous prime is 142809791. The next prime is 142809817. The reversal of 142809808 is 808908241.

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, 247216 + ... + 247792.

It is an arithmetic number, because the mean of its divisors is an integer number (7167200).

Almost surely, 2^142809808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142809808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143344000).

142809808 is an abundant number, since it is smaller than the sum of its proper divisors (143878192).

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

142809808 is a wasteful number, since it uses less digits than its factorization.

142809808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115 (or 1109 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 142809808 is about 11950.3057701466. The cubic root of 142809808 is about 522.7002146255.

The spelling of 142809808 in words is "one hundred forty-two million, eight hundred nine thousand, eight hundred eight".