1971196340 has 12 divisors (see below), whose sum is σ = 4139512356. Its totient is φ = 788478528.

The previous prime is 1971196333. The next prime is 1971196343. The reversal of 1971196340 is 436911791.

It can be written as a sum of positive squares in 2 ways, for example, as 1140142756 + 831053584 = 33766^2 + 28828^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971196343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49279889 + ... + 49279928.

It is an arithmetic number, because the mean of its divisors is an integer number (344959363).

Almost surely, 2^1971196340 is an apocalyptic number.

1971196340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1971196340 is an abundant number, since it is smaller than the sum of its proper divisors (2168316016).

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

1971196340 is a wasteful number, since it uses less digits than its factorization.

1971196340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98559826 (or 98559824 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 1971196340 is about 44398.1569437291. The cubic root of 1971196340 is about 1253.8433897724.

The spelling of 1971196340 in words is "one billion, nine hundred seventy-one million, one hundred ninety-six thousand, three hundred forty".