22640375 has 8 divisors (see below), whose sum is σ = 28255344. Its totient is φ = 18112200.

The previous prime is 22640369. The next prime is 22640389. The reversal of 22640375 is 57304622.

It is not a de Polignac number, because 22640375 - 2¹² = 22636279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90437 + ... + 90686.

It is an arithmetic number, because the mean of its divisors is an integer number (3531918).

Almost surely, 2^22640375 is an apocalyptic number.

22640375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22640375 is a deficient number, since it is larger than the sum of its proper divisors (5614969).

22640375 is an equidigital number, since it uses as much as digits as its factorization.

22640375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181138 (or 181128 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 22640375 is about 4758.1903072492. The cubic root of 22640375 is about 282.8966938466.

Adding to 22640375 its reverse (57304622), we get a palindrome (79944997).

The spelling of 22640375 in words is "twenty-two million, six hundred forty thousand, three hundred seventy-five".