78841620 has 192 divisors, whose sum is σ = 288449280. Its totient is φ = 17625600.

The previous prime is 78841619. The next prime is 78841643. The reversal of 78841620 is 2614887.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 63 ways as a sum of consecutive naturals, for example, 76710 + ... + 77730.

It is an arithmetic number, because the mean of its divisors is an integer number (1502340).

Almost surely, 2^78841620 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 78841620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144224640).

78841620 is an abundant number, since it is smaller than the sum of its proper divisors (209607660).

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

78841620 is a wasteful number, since it uses less digits than its factorization.

78841620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063 (or 1055 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 78841620 is about 8879.2803762467. The cubic root of 78841620 is about 428.7971068552.

The spelling of 78841620 in words is "seventy-eight million, eight hundred forty-one thousand, six hundred twenty".