23278345 has 8 divisors (see below), whose sum is σ = 27961920. Its totient is φ = 18604080.

The previous prime is 23278327. The next prime is 23278373. The reversal of 23278345 is 54387232.

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

It is not a de Polignac number, because 23278345 - 2⁹ = 23277833 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 23278345.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5700 + ... + 8890.

It is an arithmetic number, because the mean of its divisors is an integer number (3495240).

Almost surely, 2^23278345 is an apocalyptic number.

It is an amenable number.

23278345 is a deficient number, since it is larger than the sum of its proper divisors (4683575).

23278345 is a wasteful number, since it uses less digits than its factorization.

23278345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4655.

The product of its digits is 40320, while the sum is 34.

The square root of 23278345 is about 4824.7637247849. The cubic root of 23278345 is about 285.5293128330.

The spelling of 23278345 in words is "twenty-three million, two hundred seventy-eight thousand, three hundred forty-five".