78727406 has 4 divisors (see below), whose sum is σ = 118091112. Its totient is φ = 39363702.

The previous prime is 78727403. The next prime is 78727433. The reversal of 78727406 is 60472787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60472787 = 617 ⋅98011.

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 as a sum of consecutive naturals, namely, 19681850 + ... + 19681853.

It is an arithmetic number, because the mean of its divisors is an integer number (29522778).

Almost surely, 2^78727406 is an apocalyptic number.

78727406 is a deficient number, since it is larger than the sum of its proper divisors (39363706).

78727406 is a wasteful number, since it uses less digits than its factorization.

78727406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39363705.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 78727406 is about 8872.8465556438. The cubic root of 78727406 is about 428.5899476548.

The spelling of 78727406 in words is "seventy-eight million, seven hundred twenty-seven thousand, four hundred six".