515839994 has 8 divisors (see below), whose sum is σ = 800441460. Its totient is φ = 249026176.

The previous prime is 515839979. The next prime is 515840033. The reversal of 515839994 is 499938515.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 464187025 + 51652969 = 21545^2 + 7187^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4446839 + ... + 4446954.

Almost surely, 2^515839994 is an apocalyptic number.

515839994 is a deficient number, since it is larger than the sum of its proper divisors (284601466).

515839994 is a wasteful number, since it uses less digits than its factorization.

515839994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8893824.

The product of its digits is 1749600, while the sum is 53.

The square root of 515839994 is about 22712.1111744373. Note that the first 4 decimals coincide. The cubic root of 515839994 is about 801.9950176203.

The spelling of 515839994 in words is "five hundred fifteen million, eight hundred thirty-nine thousand, nine hundred ninety-four".