23293440 has 160 divisors (see below), whose sum is σ = 82985760. Its totient is φ = 6193152.

The previous prime is 23293429. The next prime is 23293441. The reversal of 23293440 is 4439232.

It is a happy number.

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 (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23293441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68952 + ... + 69288.

It is an arithmetic number, because the mean of its divisors is an integer number (518661).

Almost surely, 2^23293440 is an apocalyptic number.

23293440 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 23293440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41492880).

23293440 is an abundant number, since it is smaller than the sum of its proper divisors (59692320).

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

23293440 is an equidigital number, since it uses as much as digits as its factorization.

23293440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 23293440 is about 4826.3277965758. The cubic root of 23293440 is about 285.5910173010.

The spelling of 23293440 in words is "twenty-three million, two hundred ninety-three thousand, four hundred forty".