261928 has 16 divisors (see below), whose sum is σ = 508500. Its totient is φ = 126336.

The previous prime is 261917. The next prime is 261959. The reversal of 261928 is 829162.

It is a happy number.

261928 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 248004 + 13924 = 498^2 + 118^2 .

It is a junction number, because it is equal to n+sod(n) for n = 261896 and 261905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333 + ... + 796.

261928 is a Friedman number, since it can be written as (8/2)^9-6^(2+1), using all its digits and the basic arithmetic operations.

2²⁶¹⁹²⁸ is an apocalyptic number.

It is an amenable number.

261928 is a deficient number, since it is larger than the sum of its proper divisors (246572).

261928 is a wasteful number, since it uses less digits than its factorization.

261928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164 (or 1160 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 261928 is about 511.7890190303. The cubic root of 261928 is about 63.9824170448.

The spelling of 261928 in words is "two hundred sixty-one thousand, nine hundred twenty-eight".