78075216 has 30 divisors (see below), whose sum is σ = 218502570. Its totient is φ = 26025024.

The previous prime is 78075209. The next prime is 78075223. The reversal of 78075216 is 61257087.

It is an interprime number because it is at equal distance from previous prime (78075209) and next prime (78075223).

It can be written as a sum of positive squares in only one way, i.e., 77369616 + 705600 = 8796^2 + 840^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 270951 + ... + 271238.

It is an arithmetic number, because the mean of its divisors is an integer number (7283419).

Almost surely, 2^78075216 is an apocalyptic number.

It is an amenable number.

78075216 is an abundant number, since it is smaller than the sum of its proper divisors (140427354).

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

78075216 is a wasteful number, since it uses less digits than its factorization.

78075216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542203 (or 542194 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 78075216 is about 8836.0181077225. The cubic root of 78075216 is about 427.4031626357.

The spelling of 78075216 in words is "seventy-eight million, seventy-five thousand, two hundred sixteen".