78580005 has 32 divisors (see below), whose sum is σ = 146755584. Its totient is φ = 35155776.

The previous prime is 78580003. The next prime is 78580097. The reversal of 78580005 is 50008587.

It is not a de Polignac number, because 78580005 - 2¹ = 78580003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78580003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3027 + ... + 12896.

It is an arithmetic number, because the mean of its divisors is an integer number (4586112).

Almost surely, 2^78580005 is an apocalyptic number.

It is an amenable number.

78580005 is a deficient number, since it is larger than the sum of its proper divisors (68175579).

78580005 is a wasteful number, since it uses less digits than its factorization.

78580005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15985.

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 78580005 is about 8864.5363668948. The cubic root of 78580005 is about 428.3222981440.

The spelling of 78580005 in words is "seventy-eight million, five hundred eighty thousand, five".