208428147 has 24 divisors (see below), whose sum is σ = 312888576. Its totient is φ = 138651912.

The previous prime is 208428131. The next prime is 208428163. The reversal of 208428147 is 741824802.

It is an interprime number because it is at equal distance from previous prime (208428131) and next prime (208428163).

It is not a de Polignac number, because 208428147 - 2⁴ = 208428131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (208428107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215058 + ... + 216024.

It is an arithmetic number, because the mean of its divisors is an integer number (13037024).

Almost surely, 2^208428147 is an apocalyptic number.

208428147 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

208428147 is a deficient number, since it is larger than the sum of its proper divisors (104460429).

208428147 is an frugal number, since it uses more digits than its factorization.

208428147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869 (or 1857 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 208428147 is about 14437.0407978921. The cubic root of 208428147 is about 592.9054683347.

The spelling of 208428147 in words is "two hundred eight million, four hundred twenty-eight thousand, one hundred forty-seven".