78504930 has 128 divisors (see below), whose sum is σ = 242956800. Its totient is φ = 17667072.

The previous prime is 78504919. The next prime is 78504931. The reversal of 78504930 is 3940587.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78504931) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 137686 + ... + 138254.

It is an arithmetic number, because the mean of its divisors is an integer number (1898100).

Almost surely, 2^78504930 is an apocalyptic number.

78504930 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78504930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121478400).

78504930 is an abundant number, since it is smaller than the sum of its proper divisors (164451870).

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

78504930 is a wasteful number, since it uses less digits than its factorization.

78504930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 78504930 is about 8860.3007849621. The cubic root of 78504930 is about 428.1858489178.

The spelling of 78504930 in words is "seventy-eight million, five hundred four thousand, nine hundred thirty".