211990872 has 32 divisors (see below), whose sum is σ = 530334000. Its totient is φ = 70616064.

The previous prime is 211990853. The next prime is 211990873. The reversal of 211990872 is 278099112.

It is a super-2 number, since 2×211990872² = 89880259622640768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211990872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211990873) 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 7 ways as a sum of consecutive naturals, for example, 68004 + ... + 71052.

Almost surely, 2^211990872 is an apocalyptic number.

It is an amenable number.

211990872 is an abundant number, since it is smaller than the sum of its proper divisors (318343128).

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

211990872 is a wasteful number, since it uses less digits than its factorization.

211990872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5955 (or 5951 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 211990872 is about 14559.9063183799. The cubic root of 211990872 is about 596.2646378186.

The spelling of 211990872 in words is "two hundred eleven million, nine hundred ninety thousand, eight hundred seventy-two".