505866078 has 24 divisors (see below), whose sum is σ = 1096626648. Its totient is φ = 168532272.

The previous prime is 505866073. The next prime is 505866113. The reversal of 505866078 is 870668505.

505866078 is a `hidden beast` number, since 5 + 0 + 586 + 60 + 7 + 8 = 666.

It is a super-2 number, since 2×505866078² = 511800977742204168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505866073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33276 + ... + 46032.

It is an arithmetic number, because the mean of its divisors is an integer number (45692777).

Almost surely, 2^505866078 is an apocalyptic number.

505866078 is an abundant number, since it is smaller than the sum of its proper divisors (590760570).

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

505866078 is a wasteful number, since it uses less digits than its factorization.

505866078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14968 (or 14965 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 505866078 is about 22491.4667818709. The cubic root of 505866078 is about 796.7924053172.

The spelling of 505866078 in words is "five hundred five million, eight hundred sixty-six thousand, seventy-eight".