3491820 has 72 divisors (see below), whose sum is σ = 11160240. Its totient is φ = 881280.

The previous prime is 3491777. The next prime is 3491821. The reversal of 3491820 is 281943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3491821) 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, 2910 + ... + 3930.

Almost surely, 2^3491820 is an apocalyptic number.

3491820 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 3491820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5580120).

3491820 is an abundant number, since it is smaller than the sum of its proper divisors (7668420).

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

3491820 is a wasteful number, since it uses less digits than its factorization.

3491820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 3491820 is about 1868.6412175696. The cubic root of 3491820 is about 151.7110739559.

The spelling of 3491820 in words is "three million, four hundred ninety-one thousand, eight hundred twenty".