4297840 has 40 divisors (see below), whose sum is σ = 10320768. Its totient is φ = 1662720.

The previous prime is 4297817. The next prime is 4297841. The reversal of 4297840 is 487924.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 4297796 and 4297805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4297841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1614 + ... + 3346.

Almost surely, 2^4297840 is an apocalyptic number.

4297840 is a gapful number since it is divisible by the number (40) 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 4297840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5160384).

4297840 is an abundant number, since it is smaller than the sum of its proper divisors (6022928).

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

4297840 is a wasteful number, since it uses less digits than its factorization.

4297840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777 (or 1771 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 4297840 is about 2073.1232476628. The cubic root of 4297840 is about 162.5861003284.

The spelling of 4297840 in words is "four million, two hundred ninety-seven thousand, eight hundred forty".