208395864 has 24 divisors (see below), whose sum is σ = 564405660. Its totient is φ = 69465264.

The previous prime is 208395853. The next prime is 208395871. The reversal of 208395864 is 468593802.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×208395864² = 86857672264612992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1447122 + ... + 1447265.

Almost surely, 2^208395864 is an apocalyptic number.

208395864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

208395864 is an abundant number, since it is smaller than the sum of its proper divisors (356009796).

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

208395864 is a wasteful number, since it uses less digits than its factorization.

208395864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2894399 (or 2894392 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 208395864 is about 14435.9226930598. The cubic root of 208395864 is about 592.8748554579.

The spelling of 208395864 in words is "two hundred eight million, three hundred ninety-five thousand, eight hundred sixty-four".