43618428 has 108 divisors (see below), whose sum is σ = 130297440. Its totient is φ = 12265344.

The previous prime is 43618423. The next prime is 43618451. The reversal of 43618428 is 82481634.

It is a super-2 number, since 2×43618428² = 3805134522382368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 43618392 and 43618401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43618423) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 139200 + ... + 139512.

Almost surely, 2^43618428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43618428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65148720).

43618428 is an abundant number, since it is smaller than the sum of its proper divisors (86679012).

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

43618428 is a wasteful number, since it uses less digits than its factorization.

43618428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 404 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 43618428 is about 6604.4248803359. The cubic root of 43618428 is about 352.0113525092.

The spelling of 43618428 in words is "forty-three million, six hundred eighteen thousand, four hundred twenty-eight".