505720430 has 32 divisors (see below), whose sum is σ = 920172960. Its totient is φ = 200104960.

The previous prime is 505720429. The next prime is 505720459. The reversal of 505720430 is 34027505.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 505720430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573590 + ... + 574470.

It is an arithmetic number, because the mean of its divisors is an integer number (28755405).

Almost surely, 2^505720430 is an apocalyptic number.

505720430 is a deficient number, since it is larger than the sum of its proper divisors (414452530).

505720430 is a wasteful number, since it uses less digits than its factorization.

505720430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 505720430 is about 22488.2286985881. The cubic root of 505720430 is about 796.7159276585.

Adding to 505720430 its reverse (34027505), we get a palindrome (539747935).

The spelling of 505720430 in words is "five hundred five million, seven hundred twenty thousand, four hundred thirty".