23478399 has 18 divisors (see below), whose sum is σ = 39450840. Its totient is φ = 13415976.

The previous prime is 23478397. The next prime is 23478419. The reversal of 23478399 is 99387432.

It is a happy number.

It is not a de Polignac number, because 23478399 - 2¹ = 23478397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23478397) 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 17 ways as a sum of consecutive naturals, for example, 26179 + ... + 27060.

Almost surely, 2^23478399 is an apocalyptic number.

23478399 is a deficient number, since it is larger than the sum of its proper divisors (15972441).

23478399 is a wasteful number, since it uses less digits than its factorization.

23478399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53259 (or 53249 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 23478399 is about 4845.4513721634. The cubic root of 23478399 is about 286.3449267238.

The spelling of 23478399 in words is "twenty-three million, four hundred seventy-eight thousand, three hundred ninety-nine".