78505726 has 16 divisors (see below), whose sum is σ = 131191200. Its totient is φ = 34983648.

The previous prime is 78505723. The next prime is 78505727. The reversal of 78505726 is 62750587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78505723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51306 + ... + 52813.

It is an arithmetic number, because the mean of its divisors is an integer number (8199450).

Almost surely, 2^78505726 is an apocalyptic number.

78505726 is a deficient number, since it is larger than the sum of its proper divisors (52685474).

78505726 is a wasteful number, since it uses less digits than its factorization.

78505726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104163.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 78505726 is about 8860.3457043165. The cubic root of 78505726 is about 428.1872961083.

The spelling of 78505726 in words is "seventy-eight million, five hundred five thousand, seven hundred twenty-six".