212118628 has 18 divisors (see below), whose sum is σ = 374611874. Its totient is φ = 105095424.

The previous prime is 212118617. The next prime is 212118631. The reversal of 212118628 is 826811212.

It can be written as a sum of positive squares in 3 ways, for example, as 67108864 + 145009764 = 8192^2 + 12042^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212118628.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49000 + ... + 53152.

Almost surely, 2^212118628 is an apocalyptic number.

It is an amenable number.

212118628 is a deficient number, since it is larger than the sum of its proper divisors (162493246).

212118628 is a wasteful number, since it uses less digits than its factorization.

212118628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4383 (or 4268 counting only the distinct ones).

The product of its digits is 3072, while the sum is 31.

The square root of 212118628 is about 14564.2929110891. The cubic root of 212118628 is about 596.3843931127.

The spelling of 212118628 in words is "two hundred twelve million, one hundred eighteen thousand, six hundred twenty-eight".