196171840 has 56 divisors (see below), whose sum is σ = 494626392. Its totient is φ = 73850880.

The previous prime is 196171837. The next prime is 196171841. The reversal of 196171840 is 48171691.

It can be written as a sum of positive squares in 4 ways, for example, as 22353984 + 173817856 = 4728^2 + 13184^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 196171840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196171841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12591 + ... + 23470.

Almost surely, 2^196171840 is an apocalyptic number.

196171840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196171840 is an abundant number, since it is smaller than the sum of its proper divisors (298454552).

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

196171840 is a wasteful number, since it uses less digits than its factorization.

196171840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36095 (or 36085 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 196171840 is about 14006.1357982850. The cubic root of 196171840 is about 581.0482825688.

The spelling of 196171840 in words is "one hundred ninety-six million, one hundred seventy-one thousand, eight hundred forty".