23690220 has 24 divisors (see below), whose sum is σ = 66332784. Its totient is φ = 6317376.

The previous prime is 23690203. The next prime is 23690221. The reversal of 23690220 is 2209632.

It is a super-2 number, since 2×23690220² = 1122453047296800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23690221) 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, 197359 + ... + 197478.

It is an arithmetic number, because the mean of its divisors is an integer number (2763866).

Almost surely, 2^23690220 is an apocalyptic number.

23690220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23690220 is an abundant number, since it is smaller than the sum of its proper divisors (42642564).

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

23690220 is a wasteful number, since it uses less digits than its factorization.

23690220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394849 (or 394847 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 23690220 is about 4867.2600094920. The cubic root of 23690220 is about 287.2034800415.

Adding to 23690220 its reverse (2209632), we get a palindrome (25899852).

The spelling of 23690220 in words is "twenty-three million, six hundred ninety thousand, two hundred twenty".