78785800 has 24 divisors (see below), whose sum is σ = 183177450. Its totient is φ = 31514240.

The previous prime is 78785797. The next prime is 78785801. The reversal of 78785800 is 858787.

It can be written as a sum of positive squares in 3 ways, for example, as 31203396 + 47582404 = 5586^2 + 6898^2 .

It is not an unprimeable number, because it can be changed into a prime (78785801) 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, 196765 + ... + 197164.

Almost surely, 2^78785800 is an apocalyptic number.

It is an amenable number.

78785800 is an abundant number, since it is smaller than the sum of its proper divisors (104391650).

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

78785800 is a wasteful number, since it uses less digits than its factorization.

78785800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393945 (or 393936 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 43.

The square root of 78785800 is about 8876.1365469443. The cubic root of 78785800 is about 428.6958866050.

The spelling of 78785800 in words is "seventy-eight million, seven hundred eighty-five thousand, eight hundred".