78478750 has 40 divisors (see below), whose sum is σ = 168133680. Its totient is φ = 26904000.

The previous prime is 78478733. The next prime is 78478753. The reversal of 78478750 is 5787487.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 78478750.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78478753) 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 19 ways as a sum of consecutive naturals, for example, 4266 + ... + 13234.

It is an arithmetic number, because the mean of its divisors is an integer number (4203342).

Almost surely, 2^78478750 is an apocalyptic number.

78478750 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78478750 is an abundant number, since it is smaller than the sum of its proper divisors (89654930).

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

78478750 is an equidigital number, since it uses as much as digits as its factorization.

78478750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8998 (or 8983 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 46.

The square root of 78478750 is about 8858.8232852902. The cubic root of 78478750 is about 428.1382461670.

The spelling of 78478750 in words is "seventy-eight million, four hundred seventy-eight thousand, seven hundred fifty".