42443816 has 8 divisors (see below), whose sum is σ = 79582170. Its totient is φ = 21221904.

The previous prime is 42443801. The next prime is 42443857. The reversal of 42443816 is 61834424.

It can be written as a sum of positive squares in only one way, i.e., 31248100 + 11195716 = 5590^2 + 3346^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2652731 + ... + 2652746.

Almost surely, 2^42443816 is an apocalyptic number.

It is an amenable number.

42443816 is a deficient number, since it is larger than the sum of its proper divisors (37138354).

42443816 is a wasteful number, since it uses less digits than its factorization.

42443816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305483 (or 5305479 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 42443816 is about 6514.8918640297. The cubic root of 42443816 is about 348.8227549123.

The spelling of 42443816 in words is "forty-two million, four hundred forty-three thousand, eight hundred sixteen".