4239440 has 40 divisors (see below), whose sum is σ = 9943560. Its totient is φ = 1680896.

The previous prime is 4239419. The next prime is 4239449. The reversal of 4239440 is 449324.

It can be written as a sum of positive squares in 4 ways, for example, as 583696 + 3655744 = 764^2 + 1912^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4239449) 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, 15626 + ... + 15894.

It is an arithmetic number, because the mean of its divisors is an integer number (248589).

Almost surely, 2^4239440 is an apocalyptic number.

4239440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4239440 is an abundant number, since it is smaller than the sum of its proper divisors (5704120).

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

4239440 is a wasteful number, since it uses less digits than its factorization.

4239440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 4239440 is about 2058.9900436865. The cubic root of 4239440 is about 161.8463207542.

The spelling of 4239440 in words is "four million, two hundred thirty-nine thousand, four hundred forty".