78863800 has 24 divisors (see below), whose sum is σ = 183358800. Its totient is φ = 31545440.

The previous prime is 78863797. The next prime is 78863809. The reversal of 78863800 is 836887.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78863809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 196960 + ... + 197359.

It is an arithmetic number, because the mean of its divisors is an integer number (7639950).

Almost surely, 2^78863800 is an apocalyptic number.

It is an amenable number.

78863800 is an abundant number, since it is smaller than the sum of its proper divisors (104495000).

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

78863800 is a wasteful number, since it uses less digits than its factorization.

78863800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394335 (or 394326 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 78863800 is about 8880.5292635068. The cubic root of 78863800 is about 428.8373133185.

The spelling of 78863800 in words is "seventy-eight million, eight hundred sixty-three thousand, eight hundred".