512400078 has 48 divisors (see below), whose sum is σ = 1138958496. Its totient is φ = 166420800.

The previous prime is 512400071. The next prime is 512400079. The reversal of 512400078 is 870004215.

512400078 is a nontrivial binomial coefficient, being equal to C(32013, 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512400071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142276 + ... + 145832.

It is an arithmetic number, because the mean of its divisors is an integer number (23728302).

Almost surely, 2^512400078 is an apocalyptic number.

512400078 is the 32012-nd triangular number.

512400078 is an abundant number, since it is smaller than the sum of its proper divisors (626558418).

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

512400078 is a wasteful number, since it uses less digits than its factorization.

512400078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3769 (or 3766 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 512400078 is about 22636.2558299733. The cubic root of 512400078 is about 800.2083197072.

The spelling of 512400078 in words is "five hundred twelve million, four hundred thousand, seventy-eight".