78516216 has 56 divisors (see below), whose sum is σ = 220742280. Its totient is φ = 26170128.

The previous prime is 78516209. The next prime is 78516233. The reversal of 78516216 is 61261587.

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 13 ways as a sum of consecutive naturals, for example, 900 + ... + 12563.

Almost surely, 2^78516216 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 78516216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110371140).

78516216 is an abundant number, since it is smaller than the sum of its proper divisors (142226064).

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

78516216 is a wasteful number, since it uses less digits than its factorization.

78516216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13487 (or 13468 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 78516216 is about 8860.9376479016. The cubic root of 78516216 is about 428.2063668391.

The spelling of 78516216 in words is "seventy-eight million, five hundred sixteen thousand, two hundred sixteen".