196839490 has 16 divisors (see below), whose sum is σ = 355332600. Its totient is φ = 78508800.

The previous prime is 196839473. The next prime is 196839521. The reversal of 196839490 is 94938691.

It can be written as a sum of positive squares in 4 ways, for example, as 182331009 + 14508481 = 13503^2 + 3809^2 .

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24711 + ... + 31690.

Almost surely, 2^196839490 is an apocalyptic number.

196839490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

196839490 is a deficient number, since it is larger than the sum of its proper divisors (158493110).

196839490 is a wasteful number, since it uses less digits than its factorization.

196839490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56757.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 196839490 is about 14029.9497504446. The cubic root of 196839490 is about 581.7067148484.

The spelling of 196839490 in words is "one hundred ninety-six million, eight hundred thirty-nine thousand, four hundred ninety".