515115428 has 6 divisors (see below), whose sum is σ = 901452006. Its totient is φ = 257557712.

The previous prime is 515115413. The next prime is 515115439. The reversal of 515115428 is 824511515.

It can be written as a sum of positive squares in only one way, i.e., 453775204 + 61340224 = 21302^2 + 7832^2 .

It is a junction number, because it is equal to n+sod(n) for n = 515115394 and 515115403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64389425 + ... + 64389432.

It is an arithmetic number, because the mean of its divisors is an integer number (150242001).

Almost surely, 2^515115428 is an apocalyptic number.

It is an amenable number.

515115428 is a deficient number, since it is larger than the sum of its proper divisors (386336578).

515115428 is a wasteful number, since it uses less digits than its factorization.

515115428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128778861 (or 128778859 counting only the distinct ones).

The product of its digits is 8000, while the sum is 32.

The square root of 515115428 is about 22696.1544760340. The cubic root of 515115428 is about 801.6193387160.

The spelling of 515115428 in words is "five hundred fifteen million, one hundred fifteen thousand, four hundred twenty-eight".