843423906 has 64 divisors (see below), whose sum is σ = 1847260800. Its totient is φ = 256696128.

The previous prime is 843423901. The next prime is 843423929. The reversal of 843423906 is 609324348.

It is a super-2 number, since 2×843423906² = 1422727770424593672, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (843423901) 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 31 ways as a sum of consecutive naturals, for example, 1436545 + ... + 1437131.

It is an arithmetic number, because the mean of its divisors is an integer number (28863450).

Almost surely, 2^843423906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 843423906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (923630400).

843423906 is an abundant number, since it is smaller than the sum of its proper divisors (1003836894).

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

843423906 is a wasteful number, since it uses less digits than its factorization.

843423906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 843423906 is about 29041.7614135231. The cubic root of 843423906 is about 944.8190376033.

The spelling of 843423906 in words is "eight hundred forty-three million, four hundred twenty-three thousand, nine hundred six".