208447930 has 8 divisors (see below), whose sum is σ = 375206292. Its totient is φ = 83379168.

The previous prime is 208447927. The next prime is 208447933. The reversal of 208447930 is 39744802.

It is a happy number.

208447930 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (208447927) and next prime (208447933).

It can be written as a sum of positive squares in 2 ways, for example, as 202977009 + 5470921 = 14247^2 + 2339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 208447930.

It is not an unprimeable number, because it can be changed into a prime (208447933) 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, 10422387 + ... + 10422406.

Almost surely, 2^208447930 is an apocalyptic number.

208447930 is a deficient number, since it is larger than the sum of its proper divisors (166758362).

208447930 is a wasteful number, since it uses less digits than its factorization.

208447930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20844800.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 208447930 is about 14437.7259289682. The cubic root of 208447930 is about 592.9242263223.

The spelling of 208447930 in words is "two hundred eight million, four hundred forty-seven thousand, nine hundred thirty".