3430640 has 80 divisors (see below), whose sum is σ = 8764320. Its totient is φ = 1244160.

The previous prime is 3430633. The next prime is 3430643. The reversal of 3430640 is 460343.

It is a happy number.

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 (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3430643) 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, 56210 + ... + 56270.

It is an arithmetic number, because the mean of its divisors is an integer number (109554).

Almost surely, 2^3430640 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 3430640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4382160).

3430640 is an abundant number, since it is smaller than the sum of its proper divisors (5333680).

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

3430640 is a wasteful number, since it uses less digits than its factorization.

3430640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 3430640 is about 1852.1986934452. The cubic root of 3430640 is about 150.8198075706.

Adding to 3430640 its reverse (460343), we get a palindrome (3890983).

The spelling of 3430640 in words is "three million, four hundred thirty thousand, six hundred forty".