3690440 has 64 divisors (see below), whose sum is σ = 9192960. Its totient is φ = 1324800.

The previous prime is 3690437. The next prime is 3690473. The reversal of 3690440 is 440963.

3690440 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 (26).

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, 24365 + ... + 24515.

It is an arithmetic number, because the mean of its divisors is an integer number (143640).

Almost surely, 2^3690440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3690440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4596480).

3690440 is an abundant number, since it is smaller than the sum of its proper divisors (5502520).

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

3690440 is a wasteful number, since it uses less digits than its factorization.

3690440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 3690440 is about 1921.0517952413. The cubic root of 3690440 is about 154.5347128950.

The spelling of 3690440 in words is "three million, six hundred ninety thousand, four hundred forty".