1971368980 has 36 divisors (see below), whose sum is σ = 4815775188. Its totient is φ = 675897600.

The previous prime is 1971368941. The next prime is 1971369017. The reversal of 1971368980 is 898631791.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 374887044 + 1596481936 = 19362^2 + 39956^2 .

It is a congruent number.

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, 1004821 + ... + 1006780.

It is an arithmetic number, because the mean of its divisors is an integer number (133771533).

Almost surely, 2^1971368980 is an apocalyptic number.

1971368980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1971368980 is an abundant number, since it is smaller than the sum of its proper divisors (2844406208).

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

1971368980 is a wasteful number, since it uses less digits than its factorization.

1971368980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011624 (or 2011615 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 52.

The square root of 1971368980 is about 44400.1011260110. The cubic root of 1971368980 is about 1253.8799931284.

It can be divided in two parts, 197136 and 8980, that added together give a square (206116 = 454²).

The spelling of 1971368980 in words is "one billion, nine hundred seventy-one million, three hundred sixty-eight thousand, nine hundred eighty".