209212628 has 12 divisors (see below), whose sum is σ = 366461760. Its totient is φ = 104509272.

The previous prime is 209212613. The next prime is 209212639. The reversal of 209212628 is 826212902.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 209212594 and 209212603.

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 3 ways as a sum of consecutive naturals, for example, 19298 + ... + 28121.

It is an arithmetic number, because the mean of its divisors is an integer number (30538480).

Almost surely, 2^209212628 is an apocalyptic number.

It is an amenable number.

209212628 is a deficient number, since it is larger than the sum of its proper divisors (157249132).

209212628 is a wasteful number, since it uses less digits than its factorization.

209212628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48526 (or 48524 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 209212628 is about 14464.1843185159. The cubic root of 209212628 is about 593.6483954229.

The spelling of 209212628 in words is "two hundred nine million, two hundred twelve thousand, six hundred twenty-eight".