505840725 has 144 divisors (see below), whose sum is σ = 1042099968. Its totient is φ = 232657920.

The previous prime is 505840711. The next prime is 505840759. The reversal of 505840725 is 527048505.

It is a happy number.

505840725 is a `hidden beast` number, since 5 + 0 + 584 + 0 + 72 + 5 = 666.

It is not a de Polignac number, because 505840725 - 2⁷ = 505840597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505840725.

It is a congruent number.

It is an unprimeable number.

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 143 ways as a sum of consecutive naturals, for example, 4911024 + ... + 4911126.

Almost surely, 2^505840725 is an apocalyptic number.

It is an amenable number.

505840725 is an abundant number, since it is smaller than the sum of its proper divisors (536259243).

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

505840725 is a wasteful number, since it uses less digits than its factorization.

505840725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 505840725 is about 22490.9031610560. The cubic root of 505840725 is about 796.7790938789.

The spelling of 505840725 in words is "five hundred five million, eight hundred forty thousand, seven hundred twenty-five".