23210340 has 24 divisors (see below), whose sum is σ = 64989120. Its totient is φ = 6189408.

The previous prime is 23210323. The next prime is 23210347. The reversal of 23210340 is 4301232.

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

It is not an unprimeable number, because it can be changed into a prime (23210347) 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, 193360 + ... + 193479.

It is an arithmetic number, because the mean of its divisors is an integer number (2707880).

Almost surely, 2^23210340 is an apocalyptic number.

23210340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23210340 is an abundant number, since it is smaller than the sum of its proper divisors (41778780).

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

23210340 is a wasteful number, since it uses less digits than its factorization.

23210340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386851 (or 386849 counting only the distinct ones).

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

The square root of 23210340 is about 4817.7110747740. The cubic root of 23210340 is about 285.2509946471.

Adding to 23210340 its reverse (4301232), we get a palindrome (27511572).

The spelling of 23210340 in words is "twenty-three million, two hundred ten thousand, three hundred forty".