43423816 has 32 divisors (see below), whose sum is σ = 89438400. Its totient is φ = 19673280.

The previous prime is 43423811. The next prime is 43423819. The reversal of 43423816 is 61832434.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (43423811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2715 + ... + 9706.

It is an arithmetic number, because the mean of its divisors is an integer number (2794950).

Almost surely, 2^43423816 is an apocalyptic number.

43423816 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

43423816 is an abundant number, since it is smaller than the sum of its proper divisors (46014584).

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

43423816 is a wasteful number, since it uses less digits than its factorization.

43423816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12469 (or 12465 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 43423816 is about 6589.6749540474. The cubic root of 43423816 is about 351.4870498734.

The spelling of 43423816 in words is "forty-three million, four hundred twenty-three thousand, eight hundred sixteen".