78082779 has 8 divisors (see below), whose sum is σ = 104569920. Its totient is φ = 51825416.

The previous prime is 78082777. The next prime is 78082793. The reversal of 78082779 is 97728087.

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

It is a cyclic number.

It is not a de Polignac number, because 78082779 - 2¹ = 78082777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78082777) 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, 56649 + ... + 58010.

It is an arithmetic number, because the mean of its divisors is an integer number (13071240).

Almost surely, 2^78082779 is an apocalyptic number.

78082779 is a deficient number, since it is larger than the sum of its proper divisors (26487141).

78082779 is a wasteful number, since it uses less digits than its factorization.

78082779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114889.

The product of its (nonzero) digits is 395136, while the sum is 48.

The square root of 78082779 is about 8836.4460616245. The cubic root of 78082779 is about 427.4169627715.

The spelling of 78082779 in words is "seventy-eight million, eighty-two thousand, seven hundred seventy-nine".