10640291 has 4 divisors (see below), whose sum is σ = 10814784. Its totient is φ = 10465800.

The previous prime is 10640281. The next prime is 10640293. The reversal of 10640291 is 19204601.

It is a happy number.

10640291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10640291 is a prime.

It is a super-2 number, since 2×10640291² = 226431585129362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10640293) 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, 87155 + ... + 87276.

It is an arithmetic number, because the mean of its divisors is an integer number (2703696).

Almost surely, 2^10640291 is an apocalyptic number.

10640291 is a deficient number, since it is larger than the sum of its proper divisors (174493).

10640291 is an equidigital number, since it uses as much as digits as its factorization.

10640291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174492.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 10640291 is about 3261.9458916420. The cubic root of 10640291 is about 219.9468948957.

Adding to 10640291 its reverse (19204601), we get a palindrome (29844892).

The spelling of 10640291 in words is "ten million, six hundred forty thousand, two hundred ninety-one".