23940731 has 8 divisors (see below), whose sum is σ = 24440400. Its totient is φ = 23444640.

The previous prime is 23940659. The next prime is 23940767. The reversal of 23940731 is 13704932.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23940731 is a prime.

It is a super-2 number, since 2×23940731² = 1146317201628722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23940694 and 23940703.

It is not an unprimeable number, because it can be changed into a prime (23940331) 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, 15680 + ... + 17138.

It is an arithmetic number, because the mean of its divisors is an integer number (3055050).

Almost surely, 2^23940731 is an apocalyptic number.

23940731 is a deficient number, since it is larger than the sum of its proper divisors (499669).

23940731 is a wasteful number, since it uses less digits than its factorization.

23940731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 23940731 is about 4892.9266293293. The cubic root of 23940731 is about 288.2122719711.

The spelling of 23940731 in words is "twenty-three million, nine hundred forty thousand, seven hundred thirty-one".