23403402 has 48 divisors (see below), whose sum is σ = 58237920. Its totient is φ = 6717600.

The previous prime is 23403379. The next prime is 23403431. The reversal of 23403402 is 20430432.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 652 + ... + 6872.

It is an arithmetic number, because the mean of its divisors is an integer number (1213290).

Almost surely, 2^23403402 is an apocalyptic number.

23403402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 23403402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29118960).

23403402 is an abundant number, since it is smaller than the sum of its proper divisors (34834518).

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

23403402 is a wasteful number, since it uses less digits than its factorization.

23403402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6259 (or 6256 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 23403402 is about 4837.7062746719. The cubic root of 23403402 is about 286.0397111794.

Adding to 23403402 its reverse (20430432), we get a palindrome (43833834).

The spelling of 23403402 in words is "twenty-three million, four hundred three thousand, four hundred two".