211428764 has 12 divisors (see below), whose sum is σ = 378605304. Its totient is φ = 103255824.

The previous prime is 211428761. The next prime is 211428793. The reversal of 211428764 is 467824112.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211428761) by changing a digit.

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, 614447 + ... + 614790.

It is an arithmetic number, because the mean of its divisors is an integer number (31550442).

Almost surely, 2^211428764 is an apocalyptic number.

It is an amenable number.

211428764 is a deficient number, since it is larger than the sum of its proper divisors (167176540).

211428764 is a wasteful number, since it uses less digits than its factorization.

211428764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229284 (or 1229282 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 211428764 is about 14540.5902218583. The cubic root of 211428764 is about 595.7371594503.

The spelling of 211428764 in words is "two hundred eleven million, four hundred twenty-eight thousand, seven hundred sixty-four".