208431384 has 64 divisors (see below), whose sum is σ = 600268800. Its totient is φ = 59076864.

The previous prime is 208431367. The next prime is 208431427. The reversal of 208431384 is 483134802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16452 + ... + 26220.

It is an arithmetic number, because the mean of its divisors is an integer number (9379200).

Almost surely, 2^208431384 is an apocalyptic number.

208431384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208431384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300134400).

208431384 is an abundant number, since it is smaller than the sum of its proper divisors (391837416).

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

208431384 is a wasteful number, since it uses less digits than its factorization.

208431384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9912 (or 9908 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 208431384 is about 14437.1529049186. The cubic root of 208431384 is about 592.9085376979.

The spelling of 208431384 in words is "two hundred eight million, four hundred thirty-one thousand, three hundred eighty-four".