23278825 has 6 divisors (see below), whose sum is σ = 28865774. Its totient is φ = 18623040.

The previous prime is 23278823. The next prime is 23278837. The reversal of 23278825 is 52887232.

It can be written as a sum of positive squares in 3 ways, for example, as 2920681 + 20358144 = 1709^2 + 4512^2 .

It is not a de Polignac number, because 23278825 - 2¹ = 23278823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23278823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 465552 + ... + 465601.

Almost surely, 2^23278825 is an apocalyptic number.

23278825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23278825 is a deficient number, since it is larger than the sum of its proper divisors (5586949).

23278825 is an equidigital number, since it uses as much as digits as its factorization.

23278825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931163 (or 931158 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 23278825 is about 4824.8134678970. The cubic root of 23278825 is about 285.5312753598.

The spelling of 23278825 in words is "twenty-three million, two hundred seventy-eight thousand, eight hundred twenty-five".