423655520 has 24 divisors (see below), whose sum is σ = 1000886544. Its totient is φ = 169462144.

The previous prime is 423655511. The next prime is 423655537. The reversal of 423655520 is 25556324.

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 1323764 + ... + 1324083.

It is an arithmetic number, because the mean of its divisors is an integer number (41703606).

Almost surely, 2^423655520 is an apocalyptic number.

423655520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423655520 is an abundant number, since it is smaller than the sum of its proper divisors (577231024).

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

423655520 is a wasteful number, since it uses less digits than its factorization.

423655520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647862 (or 2647854 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 423655520 is about 20582.8938684530. The cubic root of 423655520 is about 751.0536420544.

The spelling of 423655520 in words is "four hundred twenty-three million, six hundred fifty-five thousand, five hundred twenty".