505689830 has 32 divisors (see below), whose sum is σ = 928369728. Its totient is φ = 198288000.

The previous prime is 505689829. The next prime is 505689839. The reversal of 505689830 is 38986505.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505689839) 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, 101600 + ... + 106460.

It is an arithmetic number, because the mean of its divisors is an integer number (29011554).

Almost surely, 2^505689830 is an apocalyptic number.

505689830 is a deficient number, since it is larger than the sum of its proper divisors (422679898).

505689830 is a wasteful number, since it uses less digits than its factorization.

505689830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5072.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 505689830 is about 22487.5483323550. The cubic root of 505689830 is about 796.6998581745.

The spelling of 505689830 in words is "five hundred five million, six hundred eighty-nine thousand, eight hundred thirty".