23404220 has 24 divisors (see below), whose sum is σ = 56170464. Its totient is φ = 8024256.

The previous prime is 23404211. The next prime is 23404229. The reversal of 23404220 is 2240432.

It is an interprime number because it is at equal distance from previous prime (23404211) and next prime (23404229).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23404229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83447 + ... + 83726.

It is an arithmetic number, because the mean of its divisors is an integer number (2340436).

Almost surely, 2^23404220 is an apocalyptic number.

23404220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23404220 is an abundant number, since it is smaller than the sum of its proper divisors (32766244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23404220 is a wasteful number, since it uses less digits than its factorization.

23404220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167189 (or 167187 counting only the distinct ones).

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

The square root of 23404220 is about 4837.7908181318. The cubic root of 23404220 is about 286.0430437114.

Adding to 23404220 its reverse (2240432), we get a palindrome (25644652).

The spelling of 23404220 in words is "twenty-three million, four hundred four thousand, two hundred twenty".