43840402 has 8 divisors (see below), whose sum is σ = 68028300. Its totient is φ = 21164304.

The previous prime is 43840397. The next prime is 43840403. The reversal of 43840402 is 20404834.

It can be written as a sum of positive squares in 2 ways, for example, as 43811161 + 29241 = 6619^2 + 171^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (43840403) 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, 377877 + ... + 377992.

Almost surely, 2^43840402 is an apocalyptic number.

43840402 is a deficient number, since it is larger than the sum of its proper divisors (24187898).

43840402 is a wasteful number, since it uses less digits than its factorization.

43840402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755900.

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

The square root of 43840402 is about 6621.2084999643. The cubic root of 43840402 is about 352.6074705423.

The spelling of 43840402 in words is "forty-three million, eight hundred forty thousand, four hundred two".