43628840 has 16 divisors (see below), whose sum is σ = 98164980. Its totient is φ = 17451520.

The previous prime is 43628833. The next prime is 43628863. The reversal of 43628840 is 4882634.

It can be written as a sum of positive squares in 2 ways, for example, as 43586404 + 42436 = 6602^2 + 206^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 43628840.

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, 545321 + ... + 545400.

Almost surely, 2^43628840 is an apocalyptic number.

43628840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43628840 is an abundant number, since it is smaller than the sum of its proper divisors (54536140).

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

43628840 is a wasteful number, since it uses less digits than its factorization.

43628840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090732 (or 1090728 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 43628840 is about 6605.2130927019. The cubic root of 43628840 is about 352.0393594073.

The spelling of 43628840 in words is "forty-three million, six hundred twenty-eight thousand, eight hundred forty".