23201340 has 24 divisors (see below), whose sum is σ = 64963920. Its totient is φ = 6187008.

The previous prime is 23201329. The next prime is 23201341. The reversal of 23201340 is 4310232.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23201341) 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, 193285 + ... + 193404.

It is an arithmetic number, because the mean of its divisors is an integer number (2706830).

Almost surely, 2^23201340 is an apocalyptic number.

23201340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23201340 is an abundant number, since it is smaller than the sum of its proper divisors (41762580).

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

23201340 is a wasteful number, since it uses less digits than its factorization.

23201340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386701 (or 386699 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 23201340 is about 4816.7769306872. The cubic root of 23201340 is about 285.2141204084.

Adding to 23201340 its reverse (4310232), we get a palindrome (27511572).

The spelling of 23201340 in words is "twenty-three million, two hundred one thousand, three hundred forty".