78147216 has 60 divisors (see below), whose sum is σ = 249950272. Its totient is φ = 22327488.

The previous prime is 78147203. The next prime is 78147241. The reversal of 78147216 is 61274187.

It is a super-2 number, since 2×78147216² = 12213974737101312, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 37756 + ... + 39771.

Almost surely, 2^78147216 is an apocalyptic number.

It is an amenable number.

78147216 is an abundant number, since it is smaller than the sum of its proper divisors (171803056).

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

78147216 is a wasteful number, since it uses less digits than its factorization.

78147216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77548 (or 77539 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 78147216 is about 8840.0914022424. The cubic root of 78147216 is about 427.5345042428.

The spelling of 78147216 in words is "seventy-eight million, one hundred forty-seven thousand, two hundred sixteen".