78528830 has 16 divisors (see below), whose sum is σ = 141489504. Its totient is φ = 31380960.

The previous prime is 78528829. The next prime is 78528833. The reversal of 78528830 is 3882587.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78528833) 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 7 ways as a sum of consecutive naturals, for example, 9020 + ... + 15440.

It is an arithmetic number, because the mean of its divisors is an integer number (8843094).

Almost surely, 2^78528830 is an apocalyptic number.

78528830 is a deficient number, since it is larger than the sum of its proper divisors (62960674).

78528830 is a wasteful number, since it uses less digits than its factorization.

78528830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7651.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 78528830 is about 8861.6493950054. The cubic root of 78528830 is about 428.2292967346.

The spelling of 78528830 in words is "seventy-eight million, five hundred twenty-eight thousand, eight hundred thirty".