211700028 has 24 divisors (see below), whose sum is σ = 499519440. Its totient is φ = 69773440.

The previous prime is 211700017. The next prime is 211700039. The reversal of 211700028 is 820007112.

211700028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (211700017) and next prime (211700039).

It is a junction number, because it is equal to n+sod(n) for n = 211699977 and 211700013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98043 + ... + 100178.

It is an arithmetic number, because the mean of its divisors is an integer number (20813310).

Almost surely, 2^211700028 is an apocalyptic number.

It is an amenable number.

211700028 is an abundant number, since it is smaller than the sum of its proper divisors (287819412).

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

211700028 is a wasteful number, since it uses less digits than its factorization.

211700028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198317 (or 198315 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 211700028 is about 14549.9150512984. The cubic root of 211700028 is about 595.9918283341.

The spelling of 211700028 in words is "two hundred eleven million, seven hundred thousand, twenty-eight".