78513850 has 24 divisors (see below), whose sum is σ = 147803040. Its totient is φ = 31025520.

The previous prime is 78513847. The next prime is 78513857. The reversal of 78513850 is 5831587.

It is not an unprimeable number, because it can be changed into a prime (78513857) 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 11 ways as a sum of consecutive naturals, for example, 5310 + ... + 13609.

It is an arithmetic number, because the mean of its divisors is an integer number (6158460).

Almost surely, 2^78513850 is an apocalyptic number.

78513850 is a deficient number, since it is larger than the sum of its proper divisors (69289190).

78513850 is a wasteful number, since it uses less digits than its factorization.

78513850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19014 (or 19009 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 78513850 is about 8860.8041395801. The cubic root of 78513850 is about 428.2020656196.

The spelling of 78513850 in words is "seventy-eight million, five hundred thirteen thousand, eight hundred fifty".