23655420 has 72 divisors (see below), whose sum is σ = 72452016. Its totient is φ = 6246912.

The previous prime is 23655419. The next prime is 23655427. The reversal of 23655420 is 2455632.

23655420 is a `hidden beast` number, since 2 + 3 + 655 + 4 + 2 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23655427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19759 + ... + 20921.

It is an arithmetic number, because the mean of its divisors is an integer number (1006278).

Almost surely, 2^23655420 is an apocalyptic number.

23655420 is a gapful number since it is divisible by the number (20) 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 23655420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36226008).

23655420 is an abundant number, since it is smaller than the sum of its proper divisors (48796596).

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

23655420 is a wasteful number, since it uses less digits than its factorization.

23655420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291 (or 1286 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 23655420 is about 4863.6837890636. The cubic root of 23655420 is about 287.0627809255.

The spelling of 23655420 in words is "twenty-three million, six hundred fifty-five thousand, four hundred twenty".