9961940 has 24 divisors (see below), whose sum is σ = 21033600. Its totient is φ = 3963168.

The previous prime is 9961937. The next prime is 9961951. The reversal of 9961940 is 491699.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 9961894 and 9961903.

It is a congruent number.

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, 2729 + ... + 5231.

It is an arithmetic number, because the mean of its divisors is an integer number (876400).

Almost surely, 2^9961940 is an apocalyptic number.

It is an amenable number.

9961940 is an abundant number, since it is smaller than the sum of its proper divisors (11071660).

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

9961940 is a wasteful number, since it uses less digits than its factorization.

9961940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2711 (or 2709 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 9961940 is about 3156.2541089082. The cubic root of 9961940 is about 215.1697955609.

It can be divided in two parts, 9961 and 940, that added together give a palindrome (10901).

The spelling of 9961940 in words is "nine million, nine hundred sixty-one thousand, nine hundred forty".