78425100 has 108 divisors (see below), whose sum is σ = 264767776. Its totient is φ = 19301760.

The previous prime is 78425069. The next prime is 78425119. The reversal of 78425100 is 152487.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8349 + ... + 15051.

Almost surely, 2^78425100 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 78425100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132383888).

78425100 is an abundant number, since it is smaller than the sum of its proper divisors (186342676).

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

78425100 is a wasteful number, since it uses less digits than its factorization.

78425100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6736 (or 6726 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 78425100 is about 8855.7947130678. The cubic root of 78425100 is about 428.0406619883.

Adding to 78425100 its reverse (152487), we get a palindrome (78577587).

The spelling of 78425100 in words is "seventy-eight million, four hundred twenty-five thousand, one hundred".