23103440 has 40 divisors (see below), whose sum is σ = 54237600. Its totient is φ = 9151616.

The previous prime is 23103439. The next prime is 23103467. The reversal of 23103440 is 4430132.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7211 + ... + 9909.

It is an arithmetic number, because the mean of its divisors is an integer number (1355940).

Almost surely, 2^23103440 is an apocalyptic number.

23103440 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 23103440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27118800).

23103440 is an abundant number, since it is smaller than the sum of its proper divisors (31134160).

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

23103440 is a wasteful number, since it uses less digits than its factorization.

23103440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819 (or 2813 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 23103440 is about 4806.6037906197. The cubic root of 23103440 is about 284.8123932031.

Adding to 23103440 its reverse (4430132), we get a palindrome (27533572).

The spelling of 23103440 in words is "twenty-three million, one hundred three thousand, four hundred forty".