23278585 has 24 divisors (see below), whose sum is σ = 31074120. Its totient is φ = 16727040.

The previous prime is 23278579. The next prime is 23278589. The reversal of 23278585 is 58587232.

It can be written as a sum of positive squares in 4 ways, for example, as 3136441 + 20142144 = 1771^2 + 4488^2 .

It is not a de Polignac number, because 23278585 - 2¹⁷ = 23147513 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (23278589) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65769 + ... + 66121.

It is an arithmetic number, because the mean of its divisors is an integer number (1294755).

Almost surely, 2^23278585 is an apocalyptic number.

It is an amenable number.

23278585 is a deficient number, since it is larger than the sum of its proper divisors (7795535).

23278585 is a wasteful number, since it uses less digits than its factorization.

23278585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 478 counting only the distinct ones).

The product of its digits is 134400, while the sum is 40.

The square root of 23278585 is about 4824.7885964050. The cubic root of 23278585 is about 285.5302940998.

The spelling of 23278585 in words is "twenty-three million, two hundred seventy-eight thousand, five hundred eighty-five".