208764534 has 16 divisors (see below), whose sum is σ = 455486400. Its totient is φ = 63261960.

The previous prime is 208764511. The next prime is 208764557. The reversal of 208764534 is 435467802.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (208764511) and next prime (208764557).

It is a junction number, because it is equal to n+sod(n) for n = 208764492 and 208764501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1581484 + ... + 1581615.

It is an arithmetic number, because the mean of its divisors is an integer number (28467900).

Almost surely, 2^208764534 is an apocalyptic number.

208764534 is an abundant number, since it is smaller than the sum of its proper divisors (246721866).

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

208764534 is a wasteful number, since it uses less digits than its factorization.

208764534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163115.

The product of its (nonzero) digits is 161280, while the sum is 39.

The square root of 208764534 is about 14448.6862378557. The cubic root of 208764534 is about 593.2242648346.

The spelling of 208764534 in words is "two hundred eight million, seven hundred sixty-four thousand, five hundred thirty-four".