3442640 has 40 divisors (see below), whose sum is σ = 8356608. Its totient is φ = 1316480.

The previous prime is 3442639. The next prime is 3442651. The reversal of 3442640 is 462443.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905 + ... + 2775.

Almost surely, 2^3442640 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 3442640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4178304).

3442640 is an abundant number, since it is smaller than the sum of its proper divisors (4913968).

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

3442640 is a wasteful number, since it uses less digits than its factorization.

3442640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907 (or 1901 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 3442640 is about 1855.4352589083. The cubic root of 3442640 is about 150.9954532789.

The spelling of 3442640 in words is "three million, four hundred forty-two thousand, six hundred forty".