3430440 has 96 divisors (see below), whose sum is σ = 12022920. Its totient is φ = 843264.

The previous prime is 3430433. The next prime is 3430451. The reversal of 3430440 is 440343.

It can be written as a sum of positive squares in 4 ways, for example, as 3048516 + 381924 = 1746^2 + 618^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4314 + ... + 5046.

Almost surely, 2^3430440 is an apocalyptic number.

3430440 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 3430440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6011460).

3430440 is an abundant number, since it is smaller than the sum of its proper divisors (8592480).

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

3430440 is a wasteful number, since it uses less digits than its factorization.

3430440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 3430440 is about 1852.1447027703. The cubic root of 3430440 is about 150.8168766746.

Adding to 3430440 its reverse (440343), we get a palindrome (3870783).

The spelling of 3430440 in words is "three million, four hundred thirty thousand, four hundred forty".