502640305 has 8 divisors (see below), whose sum is σ = 613056744. Its totient is φ = 395520000.

The previous prime is 502640297. The next prime is 502640363. The reversal of 502640305 is 503046205.

It can be written as a sum of positive squares in 4 ways, for example, as 20223009 + 482417296 = 4497^2 + 21964^2 .

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

It is not a de Polignac number, because 502640305 - 2³ = 502640297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 502640305.

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 7 ways as a sum of consecutive naturals, for example, 823696 + ... + 824305.

It is an arithmetic number, because the mean of its divisors is an integer number (76632093).

Almost surely, 2^502640305 is an apocalyptic number.

It is an amenable number.

502640305 is a deficient number, since it is larger than the sum of its proper divisors (110416439).

502640305 is a wasteful number, since it uses less digits than its factorization.

502640305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648067.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 502640305 is about 22419.6410542185. The cubic root of 502640305 is about 795.0951483497.

The spelling of 502640305 in words is "five hundred two million, six hundred forty thousand, three hundred five".