423047844 has 72 divisors (see below), whose sum is σ = 1140048000. Its totient is φ = 131886144.

The previous prime is 423047837. The next prime is 423047879. The reversal of 423047844 is 448740324.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 423047799 and 423047808.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50122 + ... + 57950.

It is an arithmetic number, because the mean of its divisors is an integer number (15834000).

Almost surely, 2^423047844 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 423047844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (570024000).

423047844 is an abundant number, since it is smaller than the sum of its proper divisors (717000156).

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

423047844 is a wasteful number, since it uses less digits than its factorization.

423047844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7937 (or 7932 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 36.

The square root of 423047844 is about 20568.1268957579. The cubic root of 423047844 is about 750.6943755917.

The spelling of 423047844 in words is "four hundred twenty-three million, forty-seven thousand, eight hundred forty-four".