43432228 has 72 divisors (see below), whose sum is σ = 93337272. Its totient is φ = 17611776.

The previous prime is 43432199. The next prime is 43432231. The reversal of 43432228 is 82223434.

It can be written as a sum of positive squares in 4 ways, for example, as 6853924 + 36578304 = 2618^2 + 6048^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 43432196 and 43432205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 384300 + ... + 384412.

It is an arithmetic number, because the mean of its divisors is an integer number (1296351).

Almost surely, 2^43432228 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 43432228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46668636).

43432228 is an abundant number, since it is smaller than the sum of its proper divisors (49905044).

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

43432228 is a wasteful number, since it uses less digits than its factorization.

43432228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 212 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

The square root of 43432228 is about 6590.3131943785. The cubic root of 43432228 is about 351.5097449321.

It can be divided in two parts, 43432 and 228, that added together give a triangular number (43660 = T₂₉₅).

The spelling of 43432228 in words is "forty-three million, four hundred thirty-two thousand, two hundred twenty-eight".