423423156 has 48 divisors (see below), whose sum is σ = 1070423424. Its totient is φ = 129495936.

The previous prime is 423423109. The next prime is 423423157. The reversal of 423423156 is 651324324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423423157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17926 + ... + 34178.

It is an arithmetic number, because the mean of its divisors is an integer number (22300488).

Almost surely, 2^423423156 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 423423156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (535211712).

423423156 is an abundant number, since it is smaller than the sum of its proper divisors (647000268).

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

423423156 is a wasteful number, since it uses less digits than its factorization.

423423156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16440 (or 16438 counting only the distinct ones).

The product of its digits is 17280, while the sum is 30.

The square root of 423423156 is about 20577.2485041125. The cubic root of 423423156 is about 750.9163058334.

The spelling of 423423156 in words is "four hundred twenty-three million, four hundred twenty-three thousand, one hundred fifty-six".