211428992 has 32 divisors (see below), whose sum is σ = 424034400. Its totient is φ = 105004800.

The previous prime is 211428977. The next prime is 211429003. The reversal of 211428992 is 299824112.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13859 + ... + 24797.

It is an arithmetic number, because the mean of its divisors is an integer number (13251075).

Almost surely, 2^211428992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211428992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212017200).

211428992 is an abundant number, since it is smaller than the sum of its proper divisors (212605408).

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

211428992 is a wasteful number, since it uses less digits than its factorization.

211428992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11104 (or 11092 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 211428992 is about 14540.5980619781. The cubic root of 211428992 is about 595.7373735934.

The spelling of 211428992 in words is "two hundred eleven million, four hundred twenty-eight thousand, nine hundred ninety-two".