260005428 has 18 divisors (see below), whose sum is σ = 657236034. Its totient is φ = 86668464.

The previous prime is 260005393. The next prime is 260005433. The reversal of 260005428 is 824500062.

260005428 is a `hidden beast` number, since 2 + 600 + 0 + 54 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 246741264 + 13264164 = 15708^2 + 3642^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3611151 + ... + 3611222.

It is an arithmetic number, because the mean of its divisors is an integer number (36513113).

Almost surely, 2^260005428 is an apocalyptic number.

It is an amenable number.

260005428 is an abundant number, since it is smaller than the sum of its proper divisors (397230606).

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

260005428 is a wasteful number, since it uses less digits than its factorization.

260005428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7222383 (or 7222378 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 260005428 is about 16124.6838108535. The cubic root of 260005428 is about 638.2548714235.

The spelling of 260005428 in words is "two hundred sixty million, five thousand, four hundred twenty-eight".