23728731 has 8 divisors (see below), whose sum is σ = 34072080. Its totient is φ = 14602272.

The previous prime is 23728721. The next prime is 23728763. The reversal of 23728731 is 13782732.

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

It is not a de Polignac number, because 23728731 - 2⁶ = 23728667 is a prime.

It is a super-2 number, since 2×23728731² = 1126105349740722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23728692 and 23728701.

It is not an unprimeable number, because it can be changed into a prime (23728711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304176 + ... + 304253.

It is an arithmetic number, because the mean of its divisors is an integer number (4259010).

Almost surely, 2^23728731 is an apocalyptic number.

23728731 is a deficient number, since it is larger than the sum of its proper divisors (10343349).

23728731 is a wasteful number, since it uses less digits than its factorization.

23728731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608445.

The product of its digits is 14112, while the sum is 33.

The square root of 23728731 is about 4871.2145302789. The cubic root of 23728731 is about 287.3590225015.

The spelling of 23728731 in words is "twenty-three million, seven hundred twenty-eight thousand, seven hundred thirty-one".