23430440 has 96 divisors (see below), whose sum is σ = 59754240. Its totient is φ = 8257920.

The previous prime is 23430431. The next prime is 23430443. The reversal of 23430440 is 4403432.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23430443) 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, 227429 + ... + 227531.

It is an arithmetic number, because the mean of its divisors is an integer number (622440).

Almost surely, 2^23430440 is an apocalyptic number.

23430440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is a pronic number, being equal to 4840×4841.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23430440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29877120).

23430440 is an abundant number, since it is smaller than the sum of its proper divisors (36323800).

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

23430440 is a wasteful number, since it uses less digits than its factorization.

23430440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 23430440 is about 4840.4999741762. The cubic root of 23430440 is about 286.1498228813.

Adding to 23430440 its reverse (4403432), we get a palindrome (27833872).

The spelling of 23430440 in words is "twenty-three million, four hundred thirty thousand, four hundred forty".