78245216 has 48 divisors (see below), whose sum is σ = 177214464. Its totient is φ = 33312384.

The previous prime is 78245207. The next prime is 78245231. The reversal of 78245216 is 61254287.

It is a super-2 number, since 2×78245216² = 12244627653773312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35441 + ... + 37583.

It is an arithmetic number, because the mean of its divisors is an integer number (3691968).

Almost surely, 2^78245216 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 78245216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88607232).

78245216 is an abundant number, since it is smaller than the sum of its proper divisors (98969248).

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

78245216 is a wasteful number, since it uses less digits than its factorization.

78245216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323 (or 2315 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 78245216 is about 8845.6325946763. The cubic root of 78245216 is about 427.7131451961.

The spelling of 78245216 in words is "seventy-eight million, two hundred forty-five thousand, two hundred sixteen".