208621134 has 48 divisors (see below), whose sum is σ = 470171520. Its totient is φ = 66781440.

The previous prime is 208621097. The next prime is 208621151. The reversal of 208621134 is 431126802.

208621134 is a `hidden beast` number, since 2 + 0 + 8 + 621 + 1 + 34 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 208621098 and 208621107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75082 + ... + 77810.

It is an arithmetic number, because the mean of its divisors is an integer number (9795240).

Almost surely, 2^208621134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208621134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235085760).

208621134 is an abundant number, since it is smaller than the sum of its proper divisors (261550386).

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

208621134 is a wasteful number, since it uses less digits than its factorization.

208621134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905 (or 2902 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 208621134 is about 14443.7229965131. The cubic root of 208621134 is about 593.0884054796.

Adding to 208621134 its reverse (431126802), we get a palindrome (639747936).

It can be divided in two parts, 2086 and 21134, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 208621134 in words is "two hundred eight million, six hundred twenty-one thousand, one hundred thirty-four".