509625540 has 48 divisors (see below), whose sum is σ = 1585503360. Its totient is φ = 135900000.

The previous prime is 509625521. The next prime is 509625553. The reversal of 509625540 is 45526905.

509625540 is a `hidden beast` number, since 5 + 0 + 96 + 25 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 509625495 and 509625504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471336 + ... + 472415.

It is an arithmetic number, because the mean of its divisors is an integer number (33031320).

Almost surely, 2^509625540 is an apocalyptic number.

It is an amenable number.

509625540 is an abundant number, since it is smaller than the sum of its proper divisors (1075877820).

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

509625540 is a wasteful number, since it uses less digits than its factorization.

509625540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943769 (or 943761 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 509625540 is about 22574.8873751343. The cubic root of 509625540 is about 798.7613853653.

The spelling of 509625540 in words is "five hundred nine million, six hundred twenty-five thousand, five hundred forty".