505260289 has 8 divisors (see below), whose sum is σ = 531401472. Its totient is φ = 479734320.

The previous prime is 505260269. The next prime is 505260317. The reversal of 505260289 is 982062505.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505260289 - 2²³ = 496871681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505260269) 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, 152119 + ... + 155404.

It is an arithmetic number, because the mean of its divisors is an integer number (66425184).

Almost surely, 2^505260289 is an apocalyptic number.

It is an amenable number.

505260289 is a deficient number, since it is larger than the sum of its proper divisors (26141183).

505260289 is a wasteful number, since it uses less digits than its factorization.

505260289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307607.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 505260289 is about 22477.9956624251. The cubic root of 505260289 is about 796.4742177565.

It can be divided in two parts, 5052 and 60289, that added together give a triangular number (65341 = T₃₆₁).

The spelling of 505260289 in words is "five hundred five million, two hundred sixty thousand, two hundred eighty-nine".