216746836 has 24 divisors (see below), whose sum is σ = 385330176. Its totient is φ = 106666560.

The previous prime is 216746819. The next prime is 216746843. The reversal of 216746836 is 638647612.

It is a junction number, because it is equal to n+sod(n) for n = 216746792 and 216746801.

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, 64920 + ... + 68176.

It is an arithmetic number, because the mean of its divisors is an integer number (16055424).

Almost surely, 2^216746836 is an apocalyptic number.

It is an amenable number.

216746836 is a deficient number, since it is larger than the sum of its proper divisors (168583340).

216746836 is a wasteful number, since it uses less digits than its factorization.

216746836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3519 (or 3517 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The square root of 216746836 is about 14722.3244088697. The cubic root of 216746836 is about 600.6907193543.

The spelling of 216746836 in words is "two hundred sixteen million, seven hundred forty-six thousand, eight hundred thirty-six".