23520406 has 24 divisors (see below), whose sum is σ = 43665264. Its totient is φ = 9303840.

The previous prime is 23520403. The next prime is 23520443. The reversal of 23520406 is 60402532.

23520406 = T₆₇₃ + T₆₇₄ + ... + T₇₆₃.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23520403) 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 11 ways as a sum of consecutive naturals, for example, 2605 + ... + 7336.

It is an arithmetic number, because the mean of its divisors is an integer number (1819386).

Almost surely, 2^23520406 is an apocalyptic number.

23520406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

23520406 is a deficient number, since it is larger than the sum of its proper divisors (20144858).

23520406 is a wasteful number, since it uses less digits than its factorization.

23520406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9976 (or 9963 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 23520406 is about 4849.7841189067. The cubic root of 23520406 is about 286.5155988490.

Adding to 23520406 its reverse (60402532), we get a palindrome (83922938).

The spelling of 23520406 in words is "twenty-three million, five hundred twenty thousand, four hundred six".