208323840 has 72 divisors (see below), whose sum is σ = 665346528. Its totient is φ = 55552000.

The previous prime is 208323799. The next prime is 208323853. The reversal of 208323840 is 48323802.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 208323798 and 208323807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23286 + ... + 30965.

It is an arithmetic number, because the mean of its divisors is an integer number (9240924).

Almost surely, 2^208323840 is an apocalyptic number.

208323840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208323840 is an abundant number, since it is smaller than the sum of its proper divisors (457022688).

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

208323840 is an equidigital number, since it uses as much as digits as its factorization.

208323840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54275 (or 54261 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 208323840 is about 14433.4278672809. The cubic root of 208323840 is about 592.8065461386.

The spelling of 208323840 in words is "two hundred eight million, three hundred twenty-three thousand, eight hundred forty".