3547440 has 120 divisors (see below), whose sum is σ = 12863760. Its totient is φ = 870912.

The previous prime is 3547429. The next prime is 3547459. The reversal of 3547440 is 447453.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9171 + ... + 9549.

It is an arithmetic number, because the mean of its divisors is an integer number (107198).

Almost surely, 2^3547440 is an apocalyptic number.

3547440 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 3547440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6431880).

3547440 is an abundant number, since it is smaller than the sum of its proper divisors (9316320).

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

3547440 is a wasteful number, since it uses less digits than its factorization.

3547440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 3547440 is about 1883.4648921602. The cubic root of 3547440 is about 152.5123523095.

The spelling of 3547440 in words is "three million, five hundred forty-seven thousand, four hundred forty".