216949626 has 24 divisors (see below), whose sum is σ = 470782260. Its totient is φ = 72205056.

The previous prime is 216949613. The next prime is 216949651. The reversal of 216949626 is 626949612.

216949626 is a `hidden beast` number, since 2 + 16 + 9 + 4 + 9 + 626 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 213890625 + 3059001 = 14625^2 + 1749^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3160 + ... + 21068.

Almost surely, 2^216949626 is an apocalyptic number.

216949626 is an abundant number, since it is smaller than the sum of its proper divisors (253832634).

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

216949626 is a wasteful number, since it uses less digits than its factorization.

216949626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18590 (or 18587 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 216949626 is about 14729.2099584465. The cubic root of 216949626 is about 600.8779979061.

The spelling of 216949626 in words is "two hundred sixteen million, nine hundred forty-nine thousand, six hundred twenty-six".