423643290 has 64 divisors (see below), whose sum is σ = 1167243264. Its totient is φ = 96395328.

The previous prime is 423643273. The next prime is 423643301. The reversal of 423643290 is 92346324.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43227 + ... + 52113.

It is an arithmetic number, because the mean of its divisors is an integer number (18238176).

Almost surely, 2^423643290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423643290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (583621632).

423643290 is an abundant number, since it is smaller than the sum of its proper divisors (743599974).

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

423643290 is a wasteful number, since it uses less digits than its factorization.

423643290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9131.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 423643290 is about 20582.5967749456. The cubic root of 423643290 is about 751.0464148977.

It can be divided in two parts, 42364 and 3290, that added together give a palindrome (45654).

The spelling of 423643290 in words is "four hundred twenty-three million, six hundred forty-three thousand, two hundred ninety".