78863830 has 32 divisors (see below), whose sum is σ = 144838368. Its totient is φ = 30912000.

The previous prime is 78863819. The next prime is 78863831. The reversal of 78863830 is 3836887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78863831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113785 + ... + 114475.

It is an arithmetic number, because the mean of its divisors is an integer number (4526199).

Almost surely, 2^78863830 is an apocalyptic number.

78863830 is a deficient number, since it is larger than the sum of its proper divisors (65974538).

78863830 is a wasteful number, since it uses less digits than its factorization.

78863830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 78863830 is about 8880.5309525951. The cubic root of 78863830 is about 428.8373676954.

The spelling of 78863830 in words is "seventy-eight million, eight hundred sixty-three thousand, eight hundred thirty".