1965707140 has 24 divisors (see below), whose sum is σ = 4239553752. Its totient is φ = 765031680.

The previous prime is 1965707131. The next prime is 1965707153. The reversal of 1965707140 is 417075691.

It can be written as a sum of positive squares in 4 ways, for example, as 700766784 + 1264940356 = 26472^2 + 35566^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1965707093 and 1965707102.

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, 1327441 + ... + 1328920.

It is an arithmetic number, because the mean of its divisors is an integer number (176648073).

Almost surely, 2^1965707140 is an apocalyptic number.

1965707140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1965707140 is an abundant number, since it is smaller than the sum of its proper divisors (2273846612).

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

1965707140 is a wasteful number, since it uses less digits than its factorization.

1965707140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656407 (or 2656405 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 1965707140 is about 44336.2959661720. The cubic root of 1965707140 is about 1252.6784465068.

The spelling of 1965707140 in words is "one billion, nine hundred sixty-five million, seven hundred seven thousand, one hundred forty".