43809228 has 24 divisors (see below), whose sum is σ = 113579760. Its totient is φ = 14603040.

The previous prime is 43809209. The next prime is 43809247. The reversal of 43809228 is 82290834.

It is an interprime number because it is at equal distance from previous prime (43809209) and next prime (43809247).

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 = 43809192 and 43809201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202713 + ... + 202928.

It is an arithmetic number, because the mean of its divisors is an integer number (4732490).

Almost surely, 2^43809228 is an apocalyptic number.

It is an amenable number.

43809228 is an abundant number, since it is smaller than the sum of its proper divisors (69770532).

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

43809228 is a wasteful number, since it uses less digits than its factorization.

43809228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405654 (or 405646 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 43809228 is about 6618.8539793532. The cubic root of 43809228 is about 352.5238734397.

The spelling of 43809228 in words is "forty-three million, eight hundred nine thousand, two hundred twenty-eight".