820342434 has 8 divisors (see below), whose sum is σ = 1640684880. Its totient is φ = 273447476.

The previous prime is 820342387. The next prime is 820342477. The reversal of 820342434 is 434243028.

820342434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

820342434 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68361864 + ... + 68361875.

It is an arithmetic number, because the mean of its divisors is an integer number (205085610).

Almost surely, 2^820342434 is an apocalyptic number.

820342434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

820342434 is a wasteful number, since it uses less digits than its factorization.

820342434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136723744.

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 820342434 is about 28641.6206594529. The cubic root of 820342434 is about 936.1204347733.

The spelling of 820342434 in words is "eight hundred twenty million, three hundred forty-two thousand, four hundred thirty-four".