78435500 has 96 divisors (see below), whose sum is σ = 201434688. Its totient is φ = 26304000.

The previous prime is 78435499. The next prime is 78435503. The reversal of 78435500 is 553487.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (78435503) 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 31 ways as a sum of consecutive naturals, for example, 70952 + ... + 72048.

It is an arithmetic number, because the mean of its divisors is an integer number (2098278).

Almost surely, 2^78435500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78435500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100717344).

78435500 is an abundant number, since it is smaller than the sum of its proper divisors (122999188).

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

78435500 is a wasteful number, since it uses less digits than its factorization.

78435500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 78435500 is about 8856.3818797520. The cubic root of 78435500 is about 428.0595820624.

Adding to 78435500 its reverse (553487), we get a palindrome (78988987).

The spelling of 78435500 in words is "seventy-eight million, four hundred thirty-five thousand, five hundred".