78342726 has 64 divisors (see below), whose sum is σ = 196816896. Its totient is φ = 20196000.

The previous prime is 78342721. The next prime is 78342743. The reversal of 78342726 is 62724387.

It is a super-2 number, since 2×78342726² = 12275165434222152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78342721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69201 + ... + 70323.

It is an arithmetic number, because the mean of its divisors is an integer number (3075264).

Almost surely, 2^78342726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78342726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98408448).

78342726 is an abundant number, since it is smaller than the sum of its proper divisors (118474170).

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

78342726 is a wasteful number, since it uses less digits than its factorization.

78342726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297.

The product of its digits is 112896, while the sum is 39.

The square root of 78342726 is about 8851.1426381005. The cubic root of 78342726 is about 427.8907449607.

The spelling of 78342726 in words is "seventy-eight million, three hundred forty-two thousand, seven hundred twenty-six".