260161720 has 64 divisors (see below), whose sum is σ = 720457920. Its totient is φ = 82335744.

The previous prime is 260161691. The next prime is 260161721. The reversal of 260161720 is 27161062.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260161721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32097 + ... + 39376.

It is an arithmetic number, because the mean of its divisors is an integer number (11257155).

Almost surely, 2^260161720 is an apocalyptic number.

260161720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

260161720 is an abundant number, since it is smaller than the sum of its proper divisors (460296200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

260161720 is a wasteful number, since it uses less digits than its factorization.

260161720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71504 (or 71500 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 260161720 is about 16129.5294413693. The cubic root of 260161720 is about 638.3827330481.

The spelling of 260161720 in words is "two hundred sixty million, one hundred sixty-one thousand, seven hundred twenty".