23198940 has 48 divisors (see below), whose sum is σ = 72176160. Its totient is φ = 6186240.

The previous prime is 23198909. The next prime is 23198941. The reversal of 23198940 is 4989132.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 23198895 and 23198904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23198941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20941 + ... + 22020.

It is an arithmetic number, because the mean of its divisors is an integer number (1503670).

Almost surely, 2^23198940 is an apocalyptic number.

23198940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23198940 is an abundant number, since it is smaller than the sum of its proper divisors (48977220).

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

23198940 is a wasteful number, since it uses less digits than its factorization.

23198940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42979 (or 42971 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 23198940 is about 4816.5277949992. The cubic root of 23198940 is about 285.2042856677.

The spelling of 23198940 in words is "twenty-three million, one hundred ninety-eight thousand, nine hundred forty".