505428730 has 32 divisors (see below), whose sum is σ = 934778880. Its totient is φ = 196644480.

The previous prime is 505428727. The next prime is 505428739. The reversal of 505428730 is 37824505.

It is a happy number.

505428730 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×505428730² = 510916402218825800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (505428739) 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, 148791 + ... + 152149.

It is an arithmetic number, because the mean of its divisors is an integer number (29211840).

Almost surely, 2^505428730 is an apocalyptic number.

505428730 is a deficient number, since it is larger than the sum of its proper divisors (429350150).

505428730 is a wasteful number, since it uses less digits than its factorization.

505428730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3774.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 505428730 is about 22481.7421477963. The cubic root of 505428730 is about 796.5627160421.

The spelling of 505428730 in words is "five hundred five million, four hundred twenty-eight thousand, seven hundred thirty".