212688004 has 6 divisors (see below), whose sum is σ = 372204014. Its totient is φ = 106344000.

The previous prime is 212687999. The next prime is 212688011. The reversal of 212688004 is 400886212.

It can be written as a sum of positive squares in only one way, i.e., 205979904 + 6708100 = 14352^2 + 2590^2 .

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 as a sum of consecutive naturals, namely, 26585997 + ... + 26586004.

Almost surely, 2^212688004 is an apocalyptic number.

It is an amenable number.

212688004 is a deficient number, since it is larger than the sum of its proper divisors (159516010).

212688004 is a wasteful number, since it uses less digits than its factorization.

212688004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53172005 (or 53172003 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 212688004 is about 14583.8267954608. The cubic root of 212688004 is about 596.9175281010.

The spelling of 212688004 in words is "two hundred twelve million, six hundred eighty-eight thousand, four".