78216752 has 10 divisors (see below), whose sum is σ = 151544988. Its totient is φ = 39108368.

The previous prime is 78216739. The next prime is 78216757. The reversal of 78216752 is 25761287.

It is a super-2 number, since 2×78216752² = 12235720586859008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78216757) by changing a digit.

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 as a sum of consecutive naturals, namely, 2444258 + ... + 2444289.

Almost surely, 2^78216752 is an apocalyptic number.

It is an amenable number.

78216752 is a deficient number, since it is larger than the sum of its proper divisors (73328236).

78216752 is a wasteful number, since it uses less digits than its factorization.

78216752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4888555 (or 4888549 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 78216752 is about 8844.0235187385. The cubic root of 78216752 is about 427.6612744912.

The spelling of 78216752 in words is "seventy-eight million, two hundred sixteen thousand, seven hundred fifty-two".