208449340 has 48 divisors (see below), whose sum is σ = 482227200. Its totient is φ = 75055680.

The previous prime is 208449313. The next prime is 208449349. The reversal of 208449340 is 43944802.

It is a super-2 number, since 2×208449340² = 86902254692871200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 208449296 and 208449305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208449349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18061 + ... + 27259.

It is an arithmetic number, because the mean of its divisors is an integer number (10046400).

Almost surely, 2^208449340 is an apocalyptic number.

208449340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208449340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241113600).

208449340 is an abundant number, since it is smaller than the sum of its proper divisors (273777860).

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

208449340 is a wasteful number, since it uses less digits than its factorization.

208449340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9322 (or 9320 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 208449340 is about 14437.7747592903. The cubic root of 208449340 is about 592.9255632210.

The spelling of 208449340 in words is "two hundred eight million, four hundred forty-nine thousand, three hundred forty".