23447040 has 160 divisors (see below), whose sum is σ = 77780736. Its totient is φ = 6021120.

The previous prime is 23447033. The next prime is 23447059. The reversal of 23447040 is 4074432.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 23447040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330205 + ... + 330275.

Almost surely, 2^23447040 is an apocalyptic number.

23447040 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 23447040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38890368).

23447040 is an abundant number, since it is smaller than the sum of its proper divisors (54333696).

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

23447040 is an equidigital number, since it uses as much as digits as its factorization.

23447040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 23447040 is about 4842.2143694801. The cubic root of 23447040 is about 286.2173840784.

It can be divided in two parts, 234 and 47040, that added together give a palindrome (47274).

The spelling of 23447040 in words is "twenty-three million, four hundred forty-seven thousand, forty".