43240020 has 48 divisors (see below), whose sum is σ = 121359168. Its totient is φ = 11503360.

The previous prime is 43240003. The next prime is 43240037. The reversal of 43240020 is 2004234.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (43240003) and next prime (43240037).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45187 + ... + 46133.

It is an arithmetic number, because the mean of its divisors is an integer number (2528316).

Almost surely, 2^43240020 is an apocalyptic number.

It is an amenable number.

43240020 is an abundant number, since it is smaller than the sum of its proper divisors (78119148).

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

43240020 is a wasteful number, since it uses less digits than its factorization.

43240020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720 (or 1718 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 43240020 is about 6575.7144098569. The cubic root of 43240020 is about 350.9904462461.

Adding to 43240020 its reverse (2004234), we get a palindrome (45244254).

The spelling of 43240020 in words is "forty-three million, two hundred forty thousand, twenty".