78641000 has 64 divisors (see below), whose sum is σ = 193752000. Its totient is φ = 29793600.

The previous prime is 78640999. The next prime is 78641033. The reversal of 78641000 is 14687.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16931 + ... + 21069.

It is an arithmetic number, because the mean of its divisors is an integer number (3027375).

Almost surely, 2^78641000 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 78641000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96876000).

78641000 is an abundant number, since it is smaller than the sum of its proper divisors (115111000).

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

78641000 is a wasteful number, since it uses less digits than its factorization.

78641000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179 (or 4165 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 78641000 is about 8867.9760937883. The cubic root of 78641000 is about 428.4330929185.

Adding to 78641000 its reverse (14687), we get a palindrome (78655687).

The spelling of 78641000 in words is "seventy-eight million, six hundred forty-one thousand".