261204528 has 40 divisors (see below), whose sum is σ = 726686128. Its totient is φ = 80370432.

The previous prime is 261204523. The next prime is 261204529. The reversal of 261204528 is 825402162.

It is a junction number, because it is equal to n+sod(n) for n = 261204495 and 261204504.

It is not an unprimeable number, because it can be changed into a prime (261204523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208675 + ... + 209922.

Almost surely, 2^261204528 is an apocalyptic number.

It is an amenable number.

261204528 is an abundant number, since it is smaller than the sum of its proper divisors (465481600).

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

261204528 is a wasteful number, since it uses less digits than its factorization.

261204528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418621 (or 418615 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 261204528 is about 16161.8231644824. The cubic root of 261204528 is about 639.2345405815.

The spelling of 261204528 in words is "two hundred sixty-one million, two hundred four thousand, five hundred twenty-eight".