208486840 has 16 divisors (see below), whose sum is σ = 469095480. Its totient is φ = 83394720.

The previous prime is 208486799. The next prime is 208486871. The reversal of 208486840 is 48684802.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 5212171 = 208486840 / (2 + 0 + 8 + 4 + 8 + 6 + 8 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 208486793 and 208486802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2606046 + ... + 2606125.

Almost surely, 2^208486840 is an apocalyptic number.

208486840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208486840 is an abundant number, since it is smaller than the sum of its proper divisors (260608640).

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

208486840 is a wasteful number, since it uses less digits than its factorization.

208486840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5212182 (or 5212178 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 40.

The square root of 208486840 is about 14439.0733774713. The cubic root of 208486840 is about 592.9611168242.

The spelling of 208486840 in words is "two hundred eight million, four hundred eighty-six thousand, eight hundred forty".