78855830 has 16 divisors (see below), whose sum is σ = 142979040. Its totient is φ = 31311552.

The previous prime is 78855827. The next prime is 78855839. The reversal of 78855830 is 3855887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78855839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27410 + ... + 30149.

It is an arithmetic number, because the mean of its divisors is an integer number (8936190).

Almost surely, 2^78855830 is an apocalyptic number.

78855830 is a deficient number, since it is larger than the sum of its proper divisors (64123210).

78855830 is a wasteful number, since it uses less digits than its factorization.

78855830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57703.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 78855830 is about 8880.0805176530. The cubic root of 78855830 is about 428.8228666880.

The spelling of 78855830 in words is "seventy-eight million, eight hundred fifty-five thousand, eight hundred thirty".