4398440 has 16 divisors (see below), whose sum is σ = 9896580. Its totient is φ = 1759360.

The previous prime is 4398431. The next prime is 4398463. The reversal of 4398440 is 448934.

It can be written as a sum of positive squares in 2 ways, for example, as 4104676 + 293764 = 2026^2 + 542^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4398397 and 4398406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54941 + ... + 55020.

Almost surely, 2^4398440 is an apocalyptic number.

4398440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4398440 is an abundant number, since it is smaller than the sum of its proper divisors (5498140).

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

4398440 is a wasteful number, since it uses less digits than its factorization.

4398440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109972 (or 109968 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 4398440 is about 2097.2458129652. The cubic root of 4398440 is about 163.8448860555.

The spelling of 4398440 in words is "four million, three hundred ninety-eight thousand, four hundred forty".