1961982 has 48 divisors (see below), whose sum is σ = 4822272. Its totient is φ = 592920.

The previous prime is 1961963. The next prime is 1961983. The reversal of 1961982 is 2891691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5163 + ... + 5529.

It is an arithmetic number, because the mean of its divisors is an integer number (100464).

2^1961982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1961982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2411136).

1961982 is an abundant number, since it is smaller than the sum of its proper divisors (2860290).

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

1961982 is a wasteful number, since it uses less digits than its factorization.

1961982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 383 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 1961982 is about 1400.7076782827. The cubic root of 1961982 is about 125.1886644359.

It can be divided in two parts, 19619 and 82, that added together give a triangular number (19701 = T₁₉₈).

The spelling of 1961982 in words is "one million, nine hundred sixty-one thousand, nine hundred eighty-two".