423665316 has 60 divisors (see below), whose sum is σ = 1111890780. Its totient is φ = 140667840.

The previous prime is 423665261. The next prime is 423665317. The reversal of 423665316 is 613566324.

It can be written as a sum of positive squares in 2 ways, for example, as 205807716 + 217857600 = 14346^2 + 14760^2 .

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

It is not an unprimeable number, because it can be changed into a prime (423665317) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 84726 + ... + 89586.

It is an arithmetic number, because the mean of its divisors is an integer number (18531513).

Almost surely, 2^423665316 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 423665316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (555945390).

423665316 is an abundant number, since it is smaller than the sum of its proper divisors (688225464).

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

423665316 is a wasteful number, since it uses less digits than its factorization.

423665316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5146 (or 5135 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 423665316 is about 20583.1318316723. The cubic root of 423665316 is about 751.0594307706.

The spelling of 423665316 in words is "four hundred twenty-three million, six hundred sixty-five thousand, three hundred sixteen".