216676628 has 36 divisors (see below), whose sum is σ = 467045460. Its totient is φ = 87397632.

The previous prime is 216676619. The next prime is 216676633. The reversal of 216676628 is 826676612.

It can be written as a sum of positive squares in 2 ways, for example, as 203119504 + 13557124 = 14252^2 + 3682^2 .

It is a super-2 number, since 2×216676628² = 93897522242900768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29183 + ... + 35846.

It is an arithmetic number, because the mean of its divisors is an integer number (12973485).

Almost surely, 2^216676628 is an apocalyptic number.

216676628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

216676628 is an abundant number, since it is smaller than the sum of its proper divisors (250368832).

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

216676628 is a wasteful number, since it uses less digits than its factorization.

216676628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65064 (or 65055 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 216676628 is about 14719.9398096595. The cubic root of 216676628 is about 600.6258543576.

The spelling of 216676628 in words is "two hundred sixteen million, six hundred seventy-six thousand, six hundred twenty-eight".