505649976 has 96 divisors (see below), whose sum is σ = 1389338160. Its totient is φ = 152423424.

The previous prime is 505649953. The next prime is 505649981. The reversal of 505649976 is 679946505.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3393550 + ... + 3393698.

Almost surely, 2^505649976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505649976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (694669080).

505649976 is an abundant number, since it is smaller than the sum of its proper divisors (883688184).

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

505649976 is a wasteful number, since it uses less digits than its factorization.

505649976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 51.

The square root of 505649976 is about 22486.6621800569. The cubic root of 505649976 is about 796.6789280124.

The spelling of 505649976 in words is "five hundred five million, six hundred forty-nine thousand, nine hundred seventy-six".