423603440 has 40 divisors (see below), whose sum is σ = 1060640448. Its totient is φ = 156407040.

The previous prime is 423603409. The next prime is 423603457. The reversal of 423603440 is 44306324.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202616 + ... + 204695.

Almost surely, 2^423603440 is an apocalyptic number.

423603440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423603440 is an abundant number, since it is smaller than the sum of its proper divisors (637037008).

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

423603440 is a wasteful number, since it uses less digits than its factorization.

423603440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407337 (or 407331 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

The square root of 423603440 is about 20581.6287013443. The cubic root of 423603440 is about 751.0228651025.

Adding to 423603440 its reverse (44306324), we get a palindrome (467909764).

The spelling of 423603440 in words is "four hundred twenty-three million, six hundred three thousand, four hundred forty".