208945540 has 12 divisors (see below), whose sum is σ = 438785676. Its totient is φ = 83578208.

The previous prime is 208945537. The next prime is 208945543. The reversal of 208945540 is 45549802.

It is an interprime number because it is at equal distance from previous prime (208945537) and next prime (208945543).

It can be written as a sum of positive squares in 2 ways, for example, as 39112516 + 169833024 = 6254^2 + 13032^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 208945540.

It is not an unprimeable number, because it can be changed into a prime (208945543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5223619 + ... + 5223658.

It is an arithmetic number, because the mean of its divisors is an integer number (36565473).

Almost surely, 2^208945540 is an apocalyptic number.

208945540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208945540 is an abundant number, since it is smaller than the sum of its proper divisors (229840136).

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

208945540 is a wasteful number, since it uses less digits than its factorization.

208945540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10447286 (or 10447284 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 208945540 is about 14454.9486335995. The cubic root of 208945540 is about 593.3956638919.

The spelling of 208945540 in words is "two hundred eight million, nine hundred forty-five thousand, five hundred forty".