43408240 has 20 divisors (see below), whose sum is σ = 100924344. Its totient is φ = 17363264.

The previous prime is 43408231. The next prime is 43408249. The reversal of 43408240 is 4280434.

43408240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (43408231) and next prime (43408249).

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-3 number, since 3×43408240³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43408249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271222 + ... + 271381.

Almost surely, 2^43408240 is an apocalyptic number.

43408240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43408240 is an abundant number, since it is smaller than the sum of its proper divisors (57516104).

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

43408240 is a wasteful number, since it uses less digits than its factorization.

43408240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542616 (or 542610 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 43408240 is about 6588.4929991615. The cubic root of 43408240 is about 351.4450190439.

Adding to 43408240 its reverse (4280434), we get a palindrome (47688674).

The spelling of 43408240 in words is "forty-three million, four hundred eight thousand, two hundred forty".