211402988 has 12 divisors (see below), whose sum is σ = 372439200. Its totient is φ = 104991792.

The previous prime is 211402979. The next prime is 211403009. The reversal of 211402988 is 889204112.

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, 176756 + ... + 177947.

It is an arithmetic number, because the mean of its divisors is an integer number (31036600).

Almost surely, 2^211402988 is an apocalyptic number.

It is an amenable number.

211402988 is a deficient number, since it is larger than the sum of its proper divisors (161036212).

211402988 is a wasteful number, since it uses less digits than its factorization.

211402988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354856 (or 354854 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 211402988 is about 14539.7038484283. The cubic root of 211402988 is about 595.7129490184.

The spelling of 211402988 in words is "two hundred eleven million, four hundred two thousand, nine hundred eighty-eight".