3491040 has 96 divisors (see below), whose sum is σ = 12579840. Its totient is φ = 797184.

The previous prime is 3491029. The next prime is 3491051. The reversal of 3491040 is 401943.

It is an interprime number because it is at equal distance from previous prime (3491029) and next prime (3491051).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 3490998 and 3491016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2841 + ... + 3879.

It is an arithmetic number, because the mean of its divisors is an integer number (131040).

Almost surely, 2^3491040 is an apocalyptic number.

3491040 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 3491040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6289920).

3491040 is an abundant number, since it is smaller than the sum of its proper divisors (9088800).

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

3491040 is a wasteful number, since it uses less digits than its factorization.

3491040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064 (or 1056 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 3491040 is about 1868.4324981117. The cubic root of 3491040 is about 151.6997767480.

Adding to 3491040 its reverse (401943), we get a palindrome (3892983).

The spelling of 3491040 in words is "three million, four hundred ninety-one thousand, forty".