3549816 has 48 divisors (see below), whose sum is σ = 9828000. Its totient is φ = 1156992.

The previous prime is 3549811. The next prime is 3549823. The reversal of 3549816 is 6189453.

3549816 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3549811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2860 + ... + 3908.

It is an arithmetic number, because the mean of its divisors is an integer number (204750).

Almost surely, 2^3549816 is an apocalyptic number.

3549816 is a gapful number since it is divisible by the number (36) 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 3549816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4914000).

3549816 is an abundant number, since it is smaller than the sum of its proper divisors (6278184).

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

3549816 is a wasteful number, since it uses less digits than its factorization.

3549816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108 (or 1101 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 3549816 is about 1884.0955389788. The cubic root of 3549816 is about 152.5463945556.

Subtracting from 3549816 its sum of digits (36), we obtain a triangular number (3549780 = T₂₆₆₄).

The spelling of 3549816 in words is "three million, five hundred forty-nine thousand, eight hundred sixteen".