23157998 has 8 divisors (see below), whose sum is σ = 36565320. Its totient is φ = 10969560.

The previous prime is 23157997. The next prime is 23158001. The reversal of 23157998 is 89975132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23157997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304673 + ... + 304748.

It is an arithmetic number, because the mean of its divisors is an integer number (4570665).

Almost surely, 2^23157998 is an apocalyptic number.

23157998 is a deficient number, since it is larger than the sum of its proper divisors (13407322).

23157998 is a wasteful number, since it uses less digits than its factorization.

23157998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609442.

The product of its digits is 136080, while the sum is 44.

The square root of 23157998 is about 4812.2757610095. The cubic root of 23157998 is about 285.0364086040.

The spelling of 23157998 in words is "twenty-three million, one hundred fifty-seven thousand, nine hundred ninety-eight".