208390964 has 36 divisors (see below), whose sum is σ = 393009120. Its totient is φ = 96647040.

The previous prime is 208390961. The next prime is 208390999. The reversal of 208390964 is 469093802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208390961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80807 + ... + 83345.

It is an arithmetic number, because the mean of its divisors is an integer number (10916920).

Almost surely, 2^208390964 is an apocalyptic number.

It is an amenable number.

208390964 is a deficient number, since it is larger than the sum of its proper divisors (184618156).

208390964 is a wasteful number, since it uses less digits than its factorization.

208390964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2648 (or 2629 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 208390964 is about 14435.7529765510. The cubic root of 208390964 is about 592.8702086773.

The spelling of 208390964 in words is "two hundred eight million, three hundred ninety thousand, nine hundred sixty-four".