23189340 has 24 divisors (see below), whose sum is σ = 64930320. Its totient is φ = 6183808.

The previous prime is 23189293. The next prime is 23189347. The reversal of 23189340 is 4398132.

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 = 23189298 and 23189307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23189347) 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, 193185 + ... + 193304.

It is an arithmetic number, because the mean of its divisors is an integer number (2705430).

Almost surely, 2^23189340 is an apocalyptic number.

23189340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23189340 is an abundant number, since it is smaller than the sum of its proper divisors (41740980).

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

23189340 is a wasteful number, since it uses less digits than its factorization.

23189340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386501 (or 386499 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 23189340 is about 4815.5311233549. The cubic root of 23189340 is about 285.1649399203.

The spelling of 23189340 in words is "twenty-three million, one hundred eighty-nine thousand, three hundred forty".