423551320 has 64 divisors (see below), whose sum is σ = 980864640. Its totient is φ = 164505600.

The previous prime is 423551309. The next prime is 423551327. The reversal of 423551320 is 23155324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423551327) 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, 443964 + ... + 444916.

It is an arithmetic number, because the mean of its divisors is an integer number (15326010).

Almost surely, 2^423551320 is an apocalyptic number.

423551320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423551320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (490432320).

423551320 is an abundant number, since it is smaller than the sum of its proper divisors (557313320).

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

423551320 is a wasteful number, since it uses less digits than its factorization.

423551320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276 (or 1272 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 423551320 is about 20580.3624846600. The cubic root of 423551320 is about 750.9920619869.

It can be divided in two parts, 4235 and 51320, that added together give a palindrome (55555).

The spelling of 423551320 in words is "four hundred twenty-three million, five hundred fifty-one thousand, three hundred twenty".