423665424 has 240 divisors, whose sum is σ = 1506748800. Its totient is φ = 111601152.

The previous prime is 423665419. The next prime is 423665443. The reversal of 423665424 is 424566324.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 510642 + ... + 511470.

It is an arithmetic number, because the mean of its divisors is an integer number (6278120).

Almost surely, 2^423665424 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 423665424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753374400).

423665424 is an abundant number, since it is smaller than the sum of its proper divisors (1083083376).

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

423665424 is a wasteful number, since it uses less digits than its factorization.

423665424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 854 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

The square root of 423665424 is about 20583.1344551796. The cubic root of 423665424 is about 751.0594945902.

The spelling of 423665424 in words is "four hundred twenty-three million, six hundred sixty-five thousand, four hundred twenty-four".