23405365 has 8 divisors (see below), whose sum is σ = 28120248. Its totient is φ = 18701760.

The previous prime is 23405357. The next prime is 23405387. The reversal of 23405365 is 56350432.

It can be written as a sum of positive squares in 4 ways, for example, as 298116 + 23107249 = 546^2 + 4807^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23405365 - 2³ = 23405357 is a prime.

It is a super-2 number, since 2×23405365² = 1095622221566450, which contains 22 as substring.

It is a Duffinian number.

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, 2755 + ... + 7375.

It is an arithmetic number, because the mean of its divisors is an integer number (3515031).

Almost surely, 2^23405365 is an apocalyptic number.

It is an amenable number.

23405365 is a deficient number, since it is larger than the sum of its proper divisors (4714883).

23405365 is a wasteful number, since it uses less digits than its factorization.

23405365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5639.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 23405365 is about 4837.9091558234. The cubic root of 23405365 is about 286.0477083110.

Adding to 23405365 its reverse (56350432), we get a palindrome (79755797).

The spelling of 23405365 in words is "twenty-three million, four hundred five thousand, three hundred sixty-five".