216908078 has 16 divisors (see below), whose sum is σ = 344580480. Its totient is φ = 102188856.

The previous prime is 216908063. The next prime is 216908089. The reversal of 216908078 is 870809612.

It is a super-2 number, since 2×216908078² = 94098228603308168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32108 + ... + 38271.

It is an arithmetic number, because the mean of its divisors is an integer number (21536280).

Almost surely, 2^216908078 is an apocalyptic number.

216908078 is a deficient number, since it is larger than the sum of its proper divisors (127672402).

216908078 is a wasteful number, since it uses less digits than its factorization.

216908078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70471.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 216908078 is about 14727.7994961909. The cubic root of 216908078 is about 600.8396374299.

The spelling of 216908078 in words is "two hundred sixteen million, nine hundred eight thousand, seventy-eight".