23255440 has 80 divisors (see below), whose sum is σ = 59371200. Its totient is φ = 8418816.

The previous prime is 23255429. The next prime is 23255471. The reversal of 23255440 is 4455232.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61171 + ... + 61549.

It is an arithmetic number, because the mean of its divisors is an integer number (742140).

Almost surely, 2^23255440 is an apocalyptic number.

23255440 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 23255440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29685600).

23255440 is an abundant number, since it is smaller than the sum of its proper divisors (36115760).

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

23255440 is a wasteful number, since it uses less digits than its factorization.

23255440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 23255440 is about 4822.3894492254. The cubic root of 23255440 is about 285.4356321305.

The spelling of 23255440 in words is "twenty-three million, two hundred fifty-five thousand, four hundred forty".