23478945 has 32 divisors (see below), whose sum is σ = 43130880. Its totient is φ = 10683840.

The previous prime is 23478941. The next prime is 23478967. The reversal of 23478945 is 54987432.

It is not a de Polignac number, because 23478945 - 2² = 23478941 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 23478897 and 23478906.

It is not an unprimeable number, because it can be changed into a prime (23478941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32296 + ... + 33014.

It is an arithmetic number, because the mean of its divisors is an integer number (1347840).

Almost surely, 2^23478945 is an apocalyptic number.

It is an amenable number.

23478945 is a deficient number, since it is larger than the sum of its proper divisors (19651935).

23478945 is a wasteful number, since it uses less digits than its factorization.

23478945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045.

The product of its digits is 241920, while the sum is 42.

The square root of 23478945 is about 4845.5077133361. The cubic root of 23478945 is about 286.3471463969.

The spelling of 23478945 in words is "twenty-three million, four hundred seventy-eight thousand, nine hundred forty-five".