260400729 has 4 divisors (see below), whose sum is σ = 347200976. Its totient is φ = 173600484.

The previous prime is 260400683. The next prime is 260400851. The reversal of 260400729 is 927004062.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 260400729 - 2⁸ = 260400473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 260400696 and 260400705.

It is not an unprimeable number, because it can be changed into a prime (260400029) 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, 43400119 + ... + 43400124.

It is an arithmetic number, because the mean of its divisors is an integer number (86800244).

Almost surely, 2^260400729 is an apocalyptic number.

It is an amenable number.

260400729 is a deficient number, since it is larger than the sum of its proper divisors (86800247).

260400729 is an equidigital number, since it uses as much as digits as its factorization.

260400729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86800246.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 260400729 is about 16136.9367911013. The cubic root of 260400729 is about 638.5781659989.

The spelling of 260400729 in words is "two hundred sixty million, four hundred thousand, seven hundred twenty-nine".