208031040 has 336 divisors, whose sum is σ = 867290112. Its totient is φ = 44679168.

The previous prime is 208031027. The next prime is 208031051. The reversal of 208031040 is 40130802.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 342417 + ... + 343023.

Almost surely, 2^208031040 is an apocalyptic number.

208031040 is a gapful number since it is divisible by the number (20) 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 208031040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (433645056).

208031040 is an abundant number, since it is smaller than the sum of its proper divisors (659259072).

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

208031040 is a wasteful number, since it uses less digits than its factorization.

208031040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 208031040 is about 14423.2811800921. The cubic root of 208031040 is about 592.5286852533.

Adding to 208031040 its reverse (40130802), we get a palindrome (248161842).

The spelling of 208031040 in words is "two hundred eight million, thirty-one thousand, forty".