208864842 has 16 divisors (see below), whose sum is σ = 421786560. Its totient is φ = 68945472.

The previous prime is 208864829. The next prime is 208864847. The reversal of 208864842 is 248468802.

It is a junction number, because it is equal to n+sod(n) for n = 208864794 and 208864803.

It is not an unprimeable number, because it can be changed into a prime (208864847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168367 + ... + 169602.

It is an arithmetic number, because the mean of its divisors is an integer number (26361660).

Almost surely, 2^208864842 is an apocalyptic number.

208864842 is an abundant number, since it is smaller than the sum of its proper divisors (212921718).

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

208864842 is a wasteful number, since it uses less digits than its factorization.

208864842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338077.

The product of its (nonzero) digits is 196608, while the sum is 42.

The square root of 208864842 is about 14452.1570016382. The cubic root of 208864842 is about 593.3192611933.

The spelling of 208864842 in words is "two hundred eight million, eight hundred sixty-four thousand, eight hundred forty-two".