196404690 has 16 divisors (see below), whose sum is σ = 471371328. Its totient is φ = 52374576.

The previous prime is 196404679. The next prime is 196404709. The reversal of 196404690 is 96404691.

It is a super-2 number, since 2×196404690² = 77149604507992200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3273382 + ... + 3273441.

It is an arithmetic number, because the mean of its divisors is an integer number (29460708).

Almost surely, 2^196404690 is an apocalyptic number.

196404690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

196404690 is an abundant number, since it is smaller than the sum of its proper divisors (274966638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

196404690 is a wasteful number, since it uses less digits than its factorization.

196404690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6546833.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 196404690 is about 14014.4457614277. The cubic root of 196404690 is about 581.2780872079.

Subtracting from 196404690 its reverse (96404691), we obtain a palindrome (99999999).

The spelling of 196404690 in words is "one hundred ninety-six million, four hundred four thousand, six hundred ninety".