23690940 has 96 divisors (see below), whose sum is σ = 81661440. Its totient is φ = 4997376.

The previous prime is 23690923. The next prime is 23690959. The reversal of 23690940 is 4909632.

It is a super-2 number, since 2×23690940² = 1122521276167200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3291 + ... + 7629.

It is an arithmetic number, because the mean of its divisors is an integer number (850640).

Almost surely, 2^23690940 is an apocalyptic number.

23690940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23690940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40830720).

23690940 is an abundant number, since it is smaller than the sum of its proper divisors (57970500).

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

23690940 is a wasteful number, since it uses less digits than its factorization.

23690940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4371 (or 4369 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 23690940 is about 4867.3339725151. Note that the first 3 decimals coincide. The cubic root of 23690940 is about 287.2063896024.

The spelling of 23690940 in words is "twenty-three million, six hundred ninety thousand, nine hundred forty".