78841428 has 24 divisors (see below), whose sum is σ = 184984800. Its totient is φ = 26134560.

The previous prime is 78841417. The next prime is 78841471. The reversal of 78841428 is 82414887.

It is a super-3 number, since 3×78841428³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78841428.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 15978 + ... + 20321.

It is an arithmetic number, because the mean of its divisors is an integer number (7707700).

Almost surely, 2^78841428 is an apocalyptic number.

It is an amenable number.

78841428 is an abundant number, since it is smaller than the sum of its proper divisors (106143372).

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

78841428 is a wasteful number, since it uses less digits than its factorization.

78841428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36487 (or 36485 counting only the distinct ones).

The product of its digits is 114688, while the sum is 42.

The square root of 78841428 is about 8879.2695645532. The cubic root of 78841428 is about 428.7967587771.

The spelling of 78841428 in words is "seventy-eight million, eight hundred forty-one thousand, four hundred twenty-eight".