605209820 has 12 divisors (see below), whose sum is σ = 1270940664. Its totient is φ = 242083920.

The previous prime is 605209819. The next prime is 605209849. The reversal of 605209820 is 28902506.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15130226 + ... + 15130265.

It is an arithmetic number, because the mean of its divisors is an integer number (105911722).

Almost surely, 2^605209820 is an apocalyptic number.

It is an amenable number.

605209820 is an abundant number, since it is smaller than the sum of its proper divisors (665730844).

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

605209820 is a wasteful number, since it uses less digits than its factorization.

605209820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30260500 (or 30260498 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 605209820 is about 24601.0125807862. The cubic root of 605209820 is about 845.8668182095.

The spelling of 605209820 in words is "six hundred five million, two hundred nine thousand, eight hundred twenty".