1962778986 has 96 divisors (see below), whose sum is σ = 5249016000. Its totient is φ = 541435104.

The previous prime is 1962778969. The next prime is 1962779011. The reversal of 1962778986 is 6898772691.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63945 + ... + 89523.

It is an arithmetic number, because the mean of its divisors is an integer number (54677250).

Almost surely, 2^1962778986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1962778986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2624508000).

1962778986 is an abundant number, since it is smaller than the sum of its proper divisors (3286237014).

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

1962778986 is a wasteful number, since it uses less digits than its factorization.

1962778986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25633 (or 25620 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The square root of 1962778986 is about 44303.2615729361. The cubic root of 1962778986 is about 1252.0561330125.

The spelling of 1962778986 in words is "one billion, nine hundred sixty-two million, seven hundred seventy-eight thousand, nine hundred eighty-six".