515868378 has 16 divisors (see below), whose sum is σ = 1032310656. Its totient is φ = 171860480.

The previous prime is 515868361. The next prime is 515868389. The reversal of 515868378 is 873868515.

It is a super-2 number, since 2×515868378² = 532240366840701768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 515868378.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11751 + ... + 34202.

It is an arithmetic number, because the mean of its divisors is an integer number (64519416).

Almost surely, 2^515868378 is an apocalyptic number.

515868378 is an abundant number, since it is smaller than the sum of its proper divisors (516442278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

515868378 is a wasteful number, since it uses less digits than its factorization.

515868378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47829.

The product of its digits is 1612800, while the sum is 51.

The square root of 515868378 is about 22712.7360306943. The cubic root of 515868378 is about 802.0097272262.

It can be divided in two parts, 5158 and 68378, that added together give a triangular number (73536 = T₃₈₃).

The spelling of 515868378 in words is "five hundred fifteen million, eight hundred sixty-eight thousand, three hundred seventy-eight".