211892890 has 16 divisors (see below), whose sum is σ = 416080800. Its totient is φ = 77051920.

The previous prime is 211892867. The next prime is 211892903. The reversal of 211892890 is 98298112.

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 7 ways as a sum of consecutive naturals, for example, 963040 + ... + 963259.

It is an arithmetic number, because the mean of its divisors is an integer number (26005050).

Almost surely, 2^211892890 is an apocalyptic number.

211892890 is a deficient number, since it is larger than the sum of its proper divisors (204187910).

211892890 is a wasteful number, since it uses less digits than its factorization.

211892890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926317.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 211892890 is about 14556.5411413563. The cubic root of 211892890 is about 596.1727593263.

The spelling of 211892890 in words is "two hundred eleven million, eight hundred ninety-two thousand, eight hundred ninety".