23220404 has 12 divisors (see below), whose sum is σ = 40933284. Its totient is φ = 11525184.

The previous prime is 23220403. The next prime is 23220437. The reversal of 23220404 is 40402232.

It can be written as a sum of positive squares in 2 ways, for example, as 6492304 + 16728100 = 2548^2 + 4090^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23220403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20639 + ... + 21734.

It is an arithmetic number, because the mean of its divisors is an integer number (3411107).

Almost surely, 2^23220404 is an apocalyptic number.

It is an amenable number.

23220404 is a deficient number, since it is larger than the sum of its proper divisors (17712880).

23220404 is a wasteful number, since it uses less digits than its factorization.

23220404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42514 (or 42512 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 23220404 is about 4818.7554409827. The cubic root of 23220404 is about 285.2922169527.

Adding to 23220404 its reverse (40402232), we get a palindrome (63622636).

The spelling of 23220404 in words is "twenty-three million, two hundred twenty thousand, four hundred four".