260661628 has 12 divisors (see below), whose sum is σ = 471887640. Its totient is φ = 125836592.

The previous prime is 260661623. The next prime is 260661637. The reversal of 260661628 is 826166062.

It is a super-2 number, since 2×260661628² = 135888968623220768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260661623) 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, 1123426 + ... + 1123657.

It is an arithmetic number, because the mean of its divisors is an integer number (39323970).

Almost surely, 2^260661628 is an apocalyptic number.

It is an amenable number.

260661628 is a deficient number, since it is larger than the sum of its proper divisors (211226012).

260661628 is a wasteful number, since it uses less digits than its factorization.

260661628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2247116 (or 2247114 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 260661628 is about 16145.0186745014. The cubic root of 260661628 is about 638.7913615040.

The spelling of 260661628 in words is "two hundred sixty million, six hundred sixty-one thousand, six hundred twenty-eight".