208149190 has 64 divisors (see below), whose sum is σ = 414056448. Its totient is φ = 74995200.

The previous prime is 208149181. The next prime is 208149191. The reversal of 208149190 is 91941802.

It is a super-2 number, since 2×208149190² = 86652170595312200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208149191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 669135 + ... + 669445.

It is an arithmetic number, because the mean of its divisors is an integer number (6469632).

Almost surely, 2^208149190 is an apocalyptic number.

208149190 is a deficient number, since it is larger than the sum of its proper divisors (205907258).

208149190 is a wasteful number, since it uses less digits than its factorization.

208149190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 208149190 is about 14427.3764073722. The cubic root of 208149190 is about 592.6408384123.

The spelling of 208149190 in words is "two hundred eight million, one hundred forty-nine thousand, one hundred ninety".