506000781 has 48 divisors (see below), whose sum is σ = 866785920. Its totient is φ = 280402560.

The previous prime is 506000773. The next prime is 506000783. The reversal of 506000781 is 187000605.

506000781 is a `hidden beast` number, since 50 + 600 + 0 + 7 + 8 + 1 = 666.

It is not a de Polignac number, because 506000781 - 2³ = 506000773 is a prime.

It is a super-2 number, since 2×506000781² = 512073580745219922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506000783) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138480 + ... + 142086.

It is an arithmetic number, because the mean of its divisors is an integer number (18058040).

Almost surely, 2^506000781 is an apocalyptic number.

It is an amenable number.

506000781 is a deficient number, since it is larger than the sum of its proper divisors (360785139).

506000781 is a wasteful number, since it uses less digits than its factorization.

506000781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3746 (or 3743 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 506000781 is about 22494.4611182398. The cubic root of 506000781 is about 796.8631228495.

The spelling of 506000781 in words is "five hundred six million, seven hundred eighty-one", and thus it is an aban number.