23157730 has 8 divisors (see below), whose sum is σ = 41683932. Its totient is φ = 9263088.

The previous prime is 23157727. The next prime is 23157749. The reversal of 23157730 is 3775132.

It can be written as a sum of positive squares in 2 ways, for example, as 21724921 + 1432809 = 4661^2 + 1197^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157877 + ... + 1157896.

Almost surely, 2^23157730 is an apocalyptic number.

23157730 is a deficient number, since it is larger than the sum of its proper divisors (18526202).

23157730 is a wasteful number, since it uses less digits than its factorization.

23157730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315780.

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 23157730 is about 4812.2479154757. The cubic root of 23157730 is about 285.0353090551.

The spelling of 23157730 in words is "twenty-three million, one hundred fifty-seven thousand, seven hundred thirty".