515952978 has 16 divisors (see below), whose sum is σ = 1067489280. Its totient is φ = 166053776.

The previous prime is 515952973. The next prime is 515953003. The reversal of 515952978 is 879259515.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 515952978.

It is not an unprimeable number, because it can be changed into a prime (515952971) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1482450 + ... + 1482797.

It is an arithmetic number, because the mean of its divisors is an integer number (66718080).

Almost surely, 2^515952978 is an apocalyptic number.

515952978 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

515952978 is an abundant number, since it is smaller than the sum of its proper divisors (551536302).

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

515952978 is a wasteful number, since it uses less digits than its factorization.

515952978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965281.

The product of its digits is 1134000, while the sum is 51.

The square root of 515952978 is about 22714.5983455574. The cubic root of 515952978 is about 802.0535667772.

The spelling of 515952978 in words is "five hundred fifteen million, nine hundred fifty-two thousand, nine hundred seventy-eight".