78380608 has 56 divisors (see below), whose sum is σ = 167527224. Its totient is φ = 36249600.

The previous prime is 78380597. The next prime is 78380623. The reversal of 78380608 is 80608387.

It can be written as a sum of positive squares in 4 ways, for example, as 17040384 + 61340224 = 4128^2 + 7832^2 .

It is a super-2 number, since 2×78380608² = 12287039420899328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65778 + ... + 66958.

Almost surely, 2^78380608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78380608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83763612).

78380608 is an abundant number, since it is smaller than the sum of its proper divisors (89146616).

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

78380608 is a wasteful number, since it uses less digits than its factorization.

78380608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1261 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 78380608 is about 8853.2823291704. The cubic root of 78380608 is about 427.9597015658.

The spelling of 78380608 in words is "seventy-eight million, three hundred eighty thousand, six hundred eight".