3387440 has 80 divisors (see below), whose sum is σ = 9427968. Its totient is φ = 1106688.

The previous prime is 3387421. The next prime is 3387443. The reversal of 3387440 is 447833.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×3387440² = 22949499507200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3387443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12749 + ... + 13011.

Almost surely, 2^3387440 is an apocalyptic number.

It is a pronic number, being equal to 1840×1841.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3387440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4713984).

3387440 is an abundant number, since it is smaller than the sum of its proper divisors (6040528).

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

3387440 is a wasteful number, since it uses less digits than its factorization.

3387440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 3387440 is about 1840.4999320837. The cubic root of 3387440 is about 150.1840703247.

The spelling of 3387440 in words is "three million, three hundred eighty-seven thousand, four hundred forty".