505530780 has 48 divisors (see below), whose sum is σ = 1421600544. Its totient is φ = 134225920.

The previous prime is 505530761. The next prime is 505530787. The reversal of 505530780 is 87035505.

It is a super-2 number, since 2×505530780² = 511122739054816800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505530787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4101 + ... + 32060.

It is an arithmetic number, because the mean of its divisors is an integer number (29616678).

Almost surely, 2^505530780 is an apocalyptic number.

It is an amenable number.

505530780 is an abundant number, since it is smaller than the sum of its proper divisors (916069764).

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

505530780 is a wasteful number, since it uses less digits than its factorization.

505530780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36406 (or 36404 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 505530780 is about 22484.0116527278. The cubic root of 505530780 is about 796.6163231747.

The spelling of 505530780 in words is "five hundred five million, five hundred thirty thousand, seven hundred eighty".