508439966 has 4 divisors (see below), whose sum is σ = 762659952. Its totient is φ = 254219982.

The previous prime is 508439929. The next prime is 508439999. The reversal of 508439966 is 669934805.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 669934805 = 5 ⋅133986961.

It is a super-2 number, since 2×508439966² = 517022398052162312, which contains 22 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 127109990 + ... + 127109993.

It is an arithmetic number, because the mean of its divisors is an integer number (190664988).

Almost surely, 2^508439966 is an apocalyptic number.

508439966 is a deficient number, since it is larger than the sum of its proper divisors (254219986).

508439966 is a wasteful number, since it uses less digits than its factorization.

508439966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254219985.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 508439966 is about 22548.6133941757. The cubic root of 508439966 is about 798.1415014473.

The spelling of 508439966 in words is "five hundred eight million, four hundred thirty-nine thousand, nine hundred sixty-six".