505749490 has 16 divisors (see below), whose sum is σ = 963899352. Its totient is φ = 190399744.

The previous prime is 505749481. The next prime is 505749509. The reversal of 505749490 is 94947505.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 312900721 + 192848769 = 17689^2 + 13887^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1487329 + ... + 1487668.

Almost surely, 2^505749490 is an apocalyptic number.

505749490 is a deficient number, since it is larger than the sum of its proper divisors (458149862).

505749490 is a wasteful number, since it uses less digits than its factorization.

505749490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2975021.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 505749490 is about 22488.8748051120. The cubic root of 505749490 is about 796.7311878168.

The spelling of 505749490 in words is "five hundred five million, seven hundred forty-nine thousand, four hundred ninety".