423440040 has 64 divisors (see below), whose sum is σ = 1291167360. Its totient is φ = 111064320.

The previous prime is 423440033. The next prime is 423440047. The reversal of 423440040 is 40044324.

It is an interprime number because it is at equal distance from previous prime (423440033) and next prime (423440047).

It is a junction number, because it is equal to n+sod(n) for n = 423439989 and 423440016.

It is not an unprimeable number, because it can be changed into a prime (423440047) 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, 21604 + ... + 36243.

It is an arithmetic number, because the mean of its divisors is an integer number (20174490).

Almost surely, 2^423440040 is an apocalyptic number.

423440040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423440040 is an abundant number, since it is smaller than the sum of its proper divisors (867727320).

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

423440040 is a wasteful number, since it uses less digits than its factorization.

423440040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57922 (or 57918 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 423440040 is about 20577.6587589551. The cubic root of 423440040 is about 750.9262866309.

Adding to 423440040 its reverse (40044324), we get a palindrome (463484364).

The spelling of 423440040 in words is "four hundred twenty-three million, four hundred forty thousand, forty".