23278725 has 24 divisors (see below), whose sum is σ = 42765120. Its totient is φ = 12414960.

The previous prime is 23278711. The next prime is 23278727. The reversal of 23278725 is 52787232.

It is a happy number.

It is not a de Polignac number, because 23278725 - 2⁴ = 23278709 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 23278725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23278727) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 16569 + ... + 17918.

It is an arithmetic number, because the mean of its divisors is an integer number (1781880).

Almost surely, 2^23278725 is an apocalyptic number.

23278725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23278725 is a deficient number, since it is larger than the sum of its proper divisors (19486395).

23278725 is a wasteful number, since it uses less digits than its factorization.

23278725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34506 (or 34495 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 23278725 is about 4824.8031047909. The cubic root of 23278725 is about 285.5308665023.

The spelling of 23278725 in words is "twenty-three million, two hundred seventy-eight thousand, seven hundred twenty-five".