423520 has 24 divisors (see below), whose sum is σ = 1000944. Its totient is φ = 169344.

The previous prime is 423509. The next prime is 423541. The reversal of 423520 is 25324.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 423494 and 423503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1164 + ... + 1483.

It is an arithmetic number, because the mean of its divisors is an integer number (41706).

2⁴²³⁵²⁰ is an apocalyptic number.

423520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423520 is an abundant number, since it is smaller than the sum of its proper divisors (577424).

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

423520 is a wasteful number, since it uses less digits than its factorization.

423520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662 (or 2654 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 423520 is about 650.7841424005. The cubic root of 423520 is about 75.0973550534.

Adding to 423520 its reverse (25324), we get a palindrome (448844).

The spelling of 423520 in words is "four hundred twenty-three thousand, five hundred twenty".