23997870 has 160 divisors (see below), whose sum is σ = 72448992. Its totient is φ = 5660928.

The previous prime is 23997839. The next prime is 23997881. The reversal of 23997870 is 7879932.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 452764 + ... + 452816.

Almost surely, 2^23997870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23997870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36224496).

23997870 is an abundant number, since it is smaller than the sum of its proper divisors (48451122).

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

23997870 is a wasteful number, since it uses less digits than its factorization.

23997870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 23997870 is about 4898.7620885281. The cubic root of 23997870 is about 288.4413804991.

The spelling of 23997870 in words is "twenty-three million, nine hundred ninety-seven thousand, eight hundred seventy".