211742028 has 36 divisors (see below), whose sum is σ = 552505408. Its totient is φ = 68303520.

The previous prime is 211741993. The next prime is 211742033. The reversal of 211742028 is 820247112.

211742028 is a `hidden beast` number, since 211 + 7 + 420 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 211741992 and 211742010.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93751 + ... + 95982.

Almost surely, 2^211742028 is an apocalyptic number.

It is an amenable number.

211742028 is an abundant number, since it is smaller than the sum of its proper divisors (340763380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211742028 is a wasteful number, since it uses less digits than its factorization.

211742028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189774 (or 189769 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 211742028 is about 14551.3582871153. The cubic root of 211742028 is about 596.0312394478.

The spelling of 211742028 in words is "two hundred eleven million, seven hundred forty-two thousand, twenty-eight".