3101940 has 72 divisors (see below), whose sum is σ = 9915360. Its totient is φ = 782784.

The previous prime is 3101897. The next prime is 3101947. The reversal of 3101940 is 491013.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3101947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2967 + ... + 3873.

Almost surely, 2^3101940 is an apocalyptic number.

3101940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3101940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4957680).

3101940 is an abundant number, since it is smaller than the sum of its proper divisors (6813420).

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

3101940 is a wasteful number, since it uses less digits than its factorization.

3101940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 3101940 is about 1761.2325229793. The cubic root of 3101940 is about 145.8403835140.

Adding to 3101940 its reverse (491013), we get a palindrome (3592953).

The spelling of 3101940 in words is "three million, one hundred one thousand, nine hundred forty".