78434800 has 30 divisors (see below), whose sum is σ = 188440568. Its totient is φ = 31373760.

The previous prime is 78434791. The next prime is 78434801. The reversal of 78434800 is 843487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78434801) 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 5 ways as a sum of consecutive naturals, for example, 97644 + ... + 98443.

Almost surely, 2^78434800 is an apocalyptic number.

It is an amenable number.

78434800 is an abundant number, since it is smaller than the sum of its proper divisors (110005768).

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

78434800 is a wasteful number, since it uses less digits than its factorization.

78434800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196105 (or 196094 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 78434800 is about 8856.3423601394. The cubic root of 78434800 is about 428.0583086484.

The spelling of 78434800 in words is "seventy-eight million, four hundred thirty-four thousand, eight hundred".