196819090 has 24 divisors (see below), whose sum is σ = 383625828. Its totient is φ = 72671040.

The previous prime is 196819039. The next prime is 196819153. The reversal of 196819090 is 90918691.

It can be written as a sum of positive squares in 6 ways, for example, as 567009 + 196252081 = 753^2 + 14009^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56541 + ... + 59920.

Almost surely, 2^196819090 is an apocalyptic number.

196819090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

196819090 is a deficient number, since it is larger than the sum of its proper divisors (186806738).

196819090 is a wasteful number, since it uses less digits than its factorization.

196819090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116494 (or 116481 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 196819090 is about 14029.2227154608. Note that the first 3 decimals coincide. The cubic root of 196819090 is about 581.6866185643.

The spelling of 196819090 in words is "one hundred ninety-six million, eight hundred nineteen thousand, ninety".