3487440 has 80 divisors (see below), whose sum is σ = 11802816. Its totient is φ = 844800.

The previous prime is 3487439. The next prime is 3487489. The reversal of 3487440 is 447843.

3487440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 3487398 and 3487407.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1980 + ... + 3300.

Almost surely, 2^3487440 is an apocalyptic number.

3487440 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 3487440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5901408).

3487440 is an abundant number, since it is smaller than the sum of its proper divisors (8315376).

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

3487440 is a wasteful number, since it uses less digits than its factorization.

3487440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348 (or 1342 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 3487440 is about 1867.4688752426. The cubic root of 3487440 is about 151.6476139708.

The spelling of 3487440 in words is "three million, four hundred eighty-seven thousand, four hundred forty".