196189990 has 16 divisors (see below), whose sum is σ = 353531952. Its totient is φ = 78389344.

The previous prime is 196189913. The next prime is 196189993. The reversal of 196189990 is 99981691.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196189993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 889 + ... + 19828.

It is an arithmetic number, because the mean of its divisors is an integer number (22095747).

Almost surely, 2^196189990 is an apocalyptic number.

196189990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

196189990 is a deficient number, since it is larger than the sum of its proper divisors (157341962).

196189990 is a wasteful number, since it uses less digits than its factorization.

196189990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21671.

The product of its (nonzero) digits is 314928, while the sum is 52.

The square root of 196189990 is about 14006.7837136153. The cubic root of 196189990 is about 581.0662017243.

The spelling of 196189990 in words is "one hundred ninety-six million, one hundred eighty-nine thousand, nine hundred ninety".