78727405 has 8 divisors (see below), whose sum is σ = 94850784. Its totient is φ = 62730000.

The previous prime is 78727403. The next prime is 78727433. The reversal of 78727405 is 50472787.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78727405 - 2¹ = 78727403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78727403) 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 7 ways as a sum of consecutive naturals, for example, 30111 + ... + 32620.

It is an arithmetic number, because the mean of its divisors is an integer number (11856348).

Almost surely, 2^78727405 is an apocalyptic number.

It is an amenable number.

78727405 is a deficient number, since it is larger than the sum of its proper divisors (16123379).

78727405 is a wasteful number, since it uses less digits than its factorization.

78727405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62987.

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 78727405 is about 8872.8464992921. The cubic root of 78727405 is about 428.5899458401.

The spelling of 78727405 in words is "seventy-eight million, seven hundred twenty-seven thousand, four hundred five".