23427405 has 12 divisors (see below), whose sum is σ = 40607580. Its totient is φ = 12494592.

The previous prime is 23427403. The next prime is 23427427. The reversal of 23427405 is 50472432.

23427405 is a `hidden beast` number, since 234 + 27 + 405 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17464041 + 5963364 = 4179^2 + 2442^2 .

It is not a de Polignac number, because 23427405 - 2¹ = 23427403 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23427403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 260260 + ... + 260349.

It is an arithmetic number, because the mean of its divisors is an integer number (3383965).

Almost surely, 2^23427405 is an apocalyptic number.

It is an amenable number.

23427405 is a deficient number, since it is larger than the sum of its proper divisors (17180175).

23427405 is a wasteful number, since it uses less digits than its factorization.

23427405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520620 (or 520617 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 23427405 is about 4840.1864633504. The cubic root of 23427405 is about 286.1374671280.

Adding to 23427405 its reverse (50472432), we get a palindrome (73899837).

It can be divided in two parts, 23427 and 405, that added together give a palindrome (23832).

The spelling of 23427405 in words is "twenty-three million, four hundred twenty-seven thousand, four hundred five".