423659520 has 144 divisors (see below), whose sum is σ = 1468647180. Its totient is φ = 112951296.

The previous prime is 423659513. The next prime is 423659531. The reversal of 423659520 is 25956324.

423659520 is a `hidden beast` number, since 42 + 3 + 6 + 595 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 379782144 + 43877376 = 19488^2 + 6624^2 .

It is a tau number, because it is divible by the number of its divisors (144).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89862 + ... + 94458.

Almost surely, 2^423659520 is an apocalyptic number.

423659520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423659520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734323590).

423659520 is an abundant number, since it is smaller than the sum of its proper divisors (1044987660).

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

423659520 is a wasteful number, since it uses less digits than its factorization.

423659520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4630 (or 4607 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 423659520 is about 20582.9910362901. The cubic root of 423659520 is about 751.0560057712.

The spelling of 423659520 in words is "four hundred twenty-three million, six hundred fifty-nine thousand, five hundred twenty".