78164448 has 24 divisors (see below), whose sum is σ = 205181928. Its totient is φ = 26054784.

The previous prime is 78164447. The next prime is 78164477. The reversal of 78164448 is 84446187.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×78164448² = 12219361862289408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78164447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407011 + ... + 407202.

It is an arithmetic number, because the mean of its divisors is an integer number (8549247).

Almost surely, 2^78164448 is an apocalyptic number.

It is an amenable number.

78164448 is an abundant number, since it is smaller than the sum of its proper divisors (127017480).

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

78164448 is a wasteful number, since it uses less digits than its factorization.

78164448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814226 (or 814218 counting only the distinct ones).

The product of its digits is 172032, while the sum is 42.

The square root of 78164448 is about 8841.0659990750. The cubic root of 78164448 is about 427.5659267021.

The spelling of 78164448 in words is "seventy-eight million, one hundred sixty-four thousand, four hundred forty-eight".