23403120 has 120 divisors (see below), whose sum is σ = 78695856. Its totient is φ = 5750784.

The previous prime is 23403097. The next prime is 23403131. The reversal of 23403120 is 2130432.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 23403120.

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 23 ways as a sum of consecutive naturals, for example, 40272 + ... + 40848.

Almost surely, 2^23403120 is an apocalyptic number.

23403120 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 23403120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39347928).

23403120 is an abundant number, since it is smaller than the sum of its proper divisors (55292736).

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

23403120 is a wasteful number, since it uses less digits than its factorization.

23403120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 23403120 is about 4837.6771285401. The cubic root of 23403120 is about 286.0385622934.

Adding to 23403120 its reverse (2130432), we get a palindrome (25533552).

It can be divided in two parts, 2340 and 3120, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 23403120 in words is "twenty-three million, four hundred three thousand, one hundred twenty".