1961984 has 26 divisors (see below), whose sum is σ = 3931680. Its totient is φ = 978944.

The previous prime is 1961983. The next prime is 1961989. The reversal of 1961984 is 4891691.

It is a happy number.

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 as a sum of consecutive naturals, namely, 3857 + ... + 4335.

2^1961984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1961984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1965840).

1961984 is an abundant number, since it is smaller than the sum of its proper divisors (1969696).

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

1961984 is an frugal number, since it uses more digits than its factorization.

1961984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 481 counting only the distinct ones).

The product of its digits is 15552, while the sum is 38.

The square root of 1961984 is about 1400.7083922073. The cubic root of 1961984 is about 125.1887069741.

The spelling of 1961984 in words is "one million, nine hundred sixty-one thousand, nine hundred eighty-four".