7878387504 has 80 divisors (see below), whose sum is σ = 22510524512. Its totient is φ = 2358595584.

The previous prime is 7878387499. The next prime is 7878387509. The reversal of 7878387504 is 4057838787.

It is an interprime number because it is at equal distance from previous prime (7878387499) and next prime (7878387509).

It is not an unprimeable number, because it can be changed into a prime (7878387509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147529 + ... + 193704.

Almost surely, 2^7878387504 is an apocalyptic number.

7878387504 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

7878387504 is an abundant number, since it is smaller than the sum of its proper divisors (14632137008).

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

7878387504 is a wasteful number, since it uses less digits than its factorization.

7878387504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341294 (or 341288 counting only the distinct ones).

The product of its (nonzero) digits is 10536960, while the sum is 57.

The square root of 7878387504 is about 88760.2811171754. The cubic root of 7878387504 is about 1989.8138344234.

The spelling of 7878387504 in words is "seven billion, eight hundred seventy-eight million, three hundred eighty-seven thousand, five hundred four".