78380164 has 12 divisors (see below), whose sum is σ = 138707100. Its totient is φ = 38749568.

The previous prime is 78380153. The next prime is 78380167. The reversal of 78380164 is 46108387.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 29268100 + 49112064 = 5410^2 + 7008^2 .

It is a super-2 number, since 2×78380164² = 12286900217333792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78380167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109729 + ... + 110440.

It is an arithmetic number, because the mean of its divisors is an integer number (11558925).

Almost surely, 2^78380164 is an apocalyptic number.

It is an amenable number.

78380164 is a deficient number, since it is larger than the sum of its proper divisors (60326936).

78380164 is a wasteful number, since it uses less digits than its factorization.

78380164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220262 (or 220260 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 78380164 is about 8853.2572536892. The cubic root of 78380164 is about 427.9588934813.

The spelling of 78380164 in words is "seventy-eight million, three hundred eighty thousand, one hundred sixty-four".