23418840 has 32 divisors (see below), whose sum is σ = 70256880. Its totient is φ = 6244992.

The previous prime is 23418833. The next prime is 23418841. The reversal of 23418840 is 4881432.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 23418798 and 23418807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23418841) 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, 97459 + ... + 97698.

Almost surely, 2^23418840 is an apocalyptic number.

23418840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23418840 is an abundant number, since it is smaller than the sum of its proper divisors (46838040).

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

23418840 is a wasteful number, since it uses less digits than its factorization.

23418840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195171 (or 195167 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 23418840 is about 4839.3016025042. The cubic root of 23418840 is about 286.1025924996.

The spelling of 23418840 in words is "twenty-three million, four hundred eighteen thousand, eight hundred forty".