43779216 has 80 divisors (see below), whose sum is σ = 128991744. Its totient is φ = 12675072.

The previous prime is 43779209. The next prime is 43779221. The reversal of 43779216 is 61297734.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8545 + ... + 12671.

Almost surely, 2^43779216 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 43779216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64495872).

43779216 is an abundant number, since it is smaller than the sum of its proper divisors (85212528).

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

43779216 is a wasteful number, since it uses less digits than its factorization.

43779216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168 (or 4162 counting only the distinct ones).

The product of its digits is 63504, while the sum is 39.

The square root of 43779216 is about 6616.5864310836. The cubic root of 43779216 is about 352.4433549138.

The spelling of 43779216 in words is "forty-three million, seven hundred seventy-nine thousand, two hundred sixteen".