78017604 has 72 divisors (see below), whose sum is σ = 212970240. Its totient is φ = 22163904.

The previous prime is 78017581. The next prime is 78017617. The reversal of 78017604 is 40671087.

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 23 ways as a sum of consecutive naturals, for example, 162637 + ... + 163115.

It is an arithmetic number, because the mean of its divisors is an integer number (2957920).

Almost surely, 2^78017604 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 78017604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106485120).

78017604 is an abundant number, since it is smaller than the sum of its proper divisors (134952636).

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

78017604 is a wasteful number, since it uses less digits than its factorization.

78017604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 78017604 is about 8832.7574403467. The cubic root of 78017604 is about 427.2980092918.

The spelling of 78017604 in words is "seventy-eight million, seventeen thousand, six hundred four".