208040864 has 12 divisors (see below), whose sum is σ = 409580514. Its totient is φ = 104020416.

The previous prime is 208040843. The next prime is 208040873. The reversal of 208040864 is 468040802.

It can be written as a sum of positive squares in only one way, i.e., 123032464 + 85008400 = 11092^2 + 9220^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 6501277 = 208040864 / (2 + 0 + 8 + 0 + 4 + 0 + 8 + 6 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 208040864.

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 as a sum of consecutive naturals, namely, 3250607 + ... + 3250670.

Almost surely, 2^208040864 is an apocalyptic number.

It is an amenable number.

208040864 is a deficient number, since it is larger than the sum of its proper divisors (201539650).

208040864 is an equidigital number, since it uses as much as digits as its factorization.

208040864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6501287 (or 6501279 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 208040864 is about 14423.6217365820. The cubic root of 208040864 is about 592.5380122431.

The spelling of 208040864 in words is "two hundred eight million, forty thousand, eight hundred sixty-four".