260640029 has 4 divisors (see below), whose sum is σ = 280689276. Its totient is φ = 240590784.

The previous prime is 260640011. The next prime is 260640041. The reversal of 260640029 is 920046062.

260640029 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 can be written as a sum of positive squares in 2 ways, for example, as 29539225 + 231100804 = 5435^2 + 15202^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260640029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 260639983 and 260640010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260649029) 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, 10024604 + ... + 10024629.

It is an arithmetic number, because the mean of its divisors is an integer number (70172319).

Almost surely, 2^260640029 is an apocalyptic number.

It is an amenable number.

260640029 is a deficient number, since it is larger than the sum of its proper divisors (20049247).

260640029 is a wasteful number, since it uses less digits than its factorization.

260640029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20049246.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 260640029 is about 16144.3497546355. The cubic root of 260640029 is about 638.7737171275.

The spelling of 260640029 in words is "two hundred sixty million, six hundred forty thousand, twenty-nine".