1965958772 has 6 divisors (see below), whose sum is σ = 3440427858. Its totient is φ = 982979384.

The previous prime is 1965958769. The next prime is 1965958783. The reversal of 1965958772 is 2778595691.

It can be written as a sum of positive squares in only one way, i.e., 1617165796 + 348792976 = 40214^2 + 18676^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245744843 + ... + 245744850.

It is an arithmetic number, because the mean of its divisors is an integer number (573404643).

Almost surely, 2^1965958772 is an apocalyptic number.

It is an amenable number.

1965958772 is a deficient number, since it is larger than the sum of its proper divisors (1474469086).

1965958772 is a wasteful number, since it uses less digits than its factorization.

1965958772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491489697 (or 491489695 counting only the distinct ones).

The product of its digits is 9525600, while the sum is 59.

The square root of 1965958772 is about 44339.1336406114. The cubic root of 1965958772 is about 1252.7318964040.

The spelling of 1965958772 in words is "one billion, nine hundred sixty-five million, nine hundred fifty-eight thousand, seven hundred seventy-two".