78328308 has 24 divisors (see below), whose sum is σ = 182977312. Its totient is φ = 26079264.

The previous prime is 78328303. The next prime is 78328319. The reversal of 78328308 is 80382387.

It is a happy number.

It is a super-5 number, since 5×78328308⁵ (a number of 41 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78328301) 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, 8691 + ... + 15237.

Almost surely, 2^78328308 is an apocalyptic number.

It is an amenable number.

78328308 is an abundant number, since it is smaller than the sum of its proper divisors (104649004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78328308 is a wasteful number, since it uses less digits than its factorization.

78328308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7551 (or 7549 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 78328308 is about 8850.3281295102. The cubic root of 78328308 is about 427.8644940349.

The spelling of 78328308 in words is "seventy-eight million, three hundred twenty-eight thousand, three hundred eight".