23440347 has 20 divisors (see below), whose sum is σ = 40019056. Its totient is φ = 13394160.

The previous prime is 23440343. The next prime is 23440349. The reversal of 23440347 is 74304432.

It is not a de Polignac number, because 23440347 - 2² = 23440343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 23440347.

It is not an unprimeable number, because it can be changed into a prime (23440343) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20104 + ... + 21237.

Almost surely, 2^23440347 is an apocalyptic number.

23440347 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

23440347 is a deficient number, since it is larger than the sum of its proper divisors (16578709).

23440347 is an equidigital number, since it uses as much as digits as its factorization.

23440347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41360 (or 41351 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 27.

The square root of 23440347 is about 4841.5232107261. The cubic root of 23440347 is about 286.1901477299.

Adding to 23440347 its reverse (74304432), we get a palindrome (97744779).

The spelling of 23440347 in words is "twenty-three million, four hundred forty thousand, three hundred forty-seven".