78342727 has 16 divisors (see below), whose sum is σ = 82818112. Its totient is φ = 74027520.

The previous prime is 78342721. The next prime is 78342743. The reversal of 78342727 is 72724387.

It is a cyclic number.

It is not a de Polignac number, because 78342727 - 2¹⁹ = 77818439 is a prime.

It is a super-2 number, since 2×78342727² = 12275165747593058, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78342727.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232303 + ... + 232639.

It is an arithmetic number, because the mean of its divisors is an integer number (5176132).

Almost surely, 2^78342727 is an apocalyptic number.

78342727 is a deficient number, since it is larger than the sum of its proper divisors (4475385).

78342727 is a wasteful number, since it uses less digits than its factorization.

78342727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538.

The product of its digits is 131712, while the sum is 40.

The square root of 78342727 is about 8851.1426945903. The cubic root of 78342727 is about 427.8907467813.

The spelling of 78342727 in words is "seventy-eight million, three hundred forty-two thousand, seven hundred twenty-seven".