23055840 has 144 divisors (see below), whose sum is σ = 81729648. Its totient is φ = 6137856.

The previous prime is 23055827. The next prime is 23055881. The reversal of 23055840 is 4855032.

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

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38584 + ... + 39176.

It is an arithmetic number, because the mean of its divisors is an integer number (567567).

Almost surely, 2^23055840 is an apocalyptic number.

23055840 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 23055840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40864824).

23055840 is an abundant number, since it is smaller than the sum of its proper divisors (58673808).

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

23055840 is an equidigital number, since it uses as much as digits as its factorization.

23055840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 23055840 is about 4801.6497165037. The cubic root of 23055840 is about 284.6166591316.

The spelling of 23055840 in words is "twenty-three million, fifty-five thousand, eight hundred forty".