78730930 has 8 divisors (see below), whose sum is σ = 141715692. Its totient is φ = 31492368.

The previous prime is 78730907. The next prime is 78730937. The reversal of 78730930 is 3903787.

It can be written as a sum of positive squares in 2 ways, for example, as 77951241 + 779689 = 8829^2 + 883^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 78730930.

It is not an unprimeable number, because it can be changed into a prime (78730937) 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 3 ways as a sum of consecutive naturals, for example, 3936537 + ... + 3936556.

Almost surely, 2^78730930 is an apocalyptic number.

78730930 is a deficient number, since it is larger than the sum of its proper divisors (62984762).

78730930 is a wasteful number, since it uses less digits than its factorization.

78730930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7873100.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 78730930 is about 8873.0451368175. The cubic root of 78730930 is about 428.5963424141.

The spelling of 78730930 in words is "seventy-eight million, seven hundred thirty thousand, nine hundred thirty".