78328605 has 16 divisors (see below), whose sum is σ = 132698304. Its totient is φ = 39317760.

The previous prime is 78328603. The next prime is 78328619. The reversal of 78328605 is 50682387.

It is not a de Polignac number, because 78328605 - 2¹ = 78328603 is a prime.

It is a super-2 number, since 2×78328605² = 12270740722492050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78328603) 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, 153331 + ... + 153840.

It is an arithmetic number, because the mean of its divisors is an integer number (8293644).

Almost surely, 2^78328605 is an apocalyptic number.

It is an amenable number.

78328605 is a deficient number, since it is larger than the sum of its proper divisors (54369699).

78328605 is a wasteful number, since it uses less digits than its factorization.

78328605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307196.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 78328605 is about 8850.3449085332. The cubic root of 78328605 is about 427.8650348168.

The spelling of 78328605 in words is "seventy-eight million, three hundred twenty-eight thousand, six hundred five".