820187342 has 8 divisors (see below), whose sum is σ = 1324918056. Its totient is φ = 378547992.

The previous prime is 820187341. The next prime is 820187363. The reversal of 820187342 is 243781028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820187341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15772808 + ... + 15772859.

It is an arithmetic number, because the mean of its divisors is an integer number (165614757).

Almost surely, 2^820187342 is an apocalyptic number.

820187342 is a deficient number, since it is larger than the sum of its proper divisors (504730714).

820187342 is a wasteful number, since it uses less digits than its factorization.

820187342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31545682.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 820187342 is about 28638.9130729502. The cubic root of 820187342 is about 936.0614374836.

The spelling of 820187342 in words is "eight hundred twenty million, one hundred eighty-seven thousand, three hundred forty-two".