423424540 has 48 divisors (see below), whose sum is σ = 1108606464. Its totient is φ = 131976000.

The previous prime is 423424537. The next prime is 423424543. The reversal of 423424540 is 45424324.

It is an interprime number because it is at equal distance from previous prime (423424537) and next prime (423424543).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 423424499 and 423424508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423424543) 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, 135936 + ... + 139015.

It is an arithmetic number, because the mean of its divisors is an integer number (23095968).

Almost surely, 2^423424540 is an apocalyptic number.

It is an amenable number.

423424540 is an abundant number, since it is smaller than the sum of its proper divisors (685181924).

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

423424540 is a wasteful number, since it uses less digits than its factorization.

423424540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274978 (or 274976 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 28.

The square root of 423424540 is about 20577.2821334597. The cubic root of 423424540 is about 750.9171239803.

Adding to 423424540 its reverse (45424324), we get a palindrome (468848864).

The spelling of 423424540 in words is "four hundred twenty-three million, four hundred twenty-four thousand, five hundred forty".