209867652 has 96 divisors (see below), whose sum is σ = 580688640. Its totient is φ = 65318400.

The previous prime is 209867611. The next prime is 209867659. The reversal of 209867652 is 256768902.

209867652 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 209867598 and 209867607.

It is not an unprimeable number, because it can be changed into a prime (209867659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276858 + ... + 277614.

It is an arithmetic number, because the mean of its divisors is an integer number (6048840).

Almost surely, 2^209867652 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 209867652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290344320).

209867652 is an abundant number, since it is smaller than the sum of its proper divisors (370820988).

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

209867652 is a wasteful number, since it uses less digits than its factorization.

209867652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938 (or 930 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 209867652 is about 14486.8095866550. The cubic root of 209867652 is about 594.2673013874.

The spelling of 209867652 in words is "two hundred nine million, eight hundred sixty-seven thousand, six hundred fifty-two".