208104440 has 32 divisors (see below), whose sum is σ = 472880160. Its totient is φ = 82416000.

The previous prime is 208104433. The next prime is 208104451. The reversal of 208104440 is 44401802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21716 + ... + 29795.

It is an arithmetic number, because the mean of its divisors is an integer number (14777505).

Almost surely, 2^208104440 is an apocalyptic number.

208104440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208104440 is an abundant number, since it is smaller than the sum of its proper divisors (264775720).

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

208104440 is a wasteful number, since it uses less digits than its factorization.

208104440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51623 (or 51619 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 208104440 is about 14425.8254529854. The cubic root of 208104440 is about 592.5983647451.

The spelling of 208104440 in words is "two hundred eight million, one hundred four thousand, four hundred forty".