423253520 has 40 divisors (see below), whose sum is σ = 995936256. Its totient is φ = 167259008.

The previous prime is 423253513. The next prime is 423253541. The reversal of 423253520 is 25352324.

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

It is a self number, because there is not a number n which added to its sum of digits gives 423253520.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25232 + ... + 38511.

Almost surely, 2^423253520 is an apocalyptic number.

423253520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423253520 is an abundant number, since it is smaller than the sum of its proper divisors (572682736).

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

423253520 is a wasteful number, since it uses less digits than its factorization.

423253520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63839 (or 63833 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 423253520 is about 20573.1261601148. The cubic root of 423253520 is about 750.8160125834.

The spelling of 423253520 in words is "four hundred twenty-three million, two hundred fifty-three thousand, five hundred twenty".