515478912 has 128 divisors (see below), whose sum is σ = 1522590720. Its totient is φ = 153446400.

The previous prime is 515478869. The next prime is 515478917. The reversal of 515478912 is 219874515.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515478917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153087 + ... + 156417.

It is an arithmetic number, because the mean of its divisors is an integer number (11895240).

Almost surely, 2^515478912 is an apocalyptic number.

515478912 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 515478912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (761295360).

515478912 is an abundant number, since it is smaller than the sum of its proper divisors (1007111808).

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

515478912 is a wasteful number, since it uses less digits than its factorization.

515478912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3392 (or 3380 counting only the distinct ones).

The product of its digits is 100800, while the sum is 42.

The square root of 515478912 is about 22704.1606759642. The cubic root of 515478912 is about 801.8078448771.

The spelling of 515478912 in words is "five hundred fifteen million, four hundred seventy-eight thousand, nine hundred twelve".