43838440 has 16 divisors (see below), whose sum is σ = 98636580. Its totient is φ = 17535360.

The previous prime is 43838429. The next prime is 43838441. The reversal of 43838440 is 4483834.

It can be written as a sum of positive squares in 2 ways, for example, as 43480836 + 357604 = 6594^2 + 598^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43838396 and 43838405.

It is not an unprimeable number, because it can be changed into a prime (43838441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547941 + ... + 548020.

Almost surely, 2^43838440 is an apocalyptic number.

43838440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43838440 is an abundant number, since it is smaller than the sum of its proper divisors (54798140).

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

43838440 is a wasteful number, since it uses less digits than its factorization.

43838440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095972 (or 1095968 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 43838440 is about 6621.0603380425. The cubic root of 43838440 is about 352.6022103550.

The spelling of 43838440 in words is "forty-three million, eight hundred thirty-eight thousand, four hundred forty".