42444436 has 6 divisors (see below), whose sum is σ = 74277770. Its totient is φ = 21222216.

The previous prime is 42444421. The next prime is 42444473. The reversal of 42444436 is 63444424.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 33408400 + 9036036 = 5780^2 + 3006^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42444398 and 42444407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305551 + ... + 5305558.

Almost surely, 2^42444436 is an apocalyptic number.

It is an amenable number.

42444436 is a deficient number, since it is larger than the sum of its proper divisors (31833334).

42444436 is a wasteful number, since it uses less digits than its factorization.

42444436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10611113 (or 10611111 counting only the distinct ones).

The product of its digits is 36864, while the sum is 31.

The square root of 42444436 is about 6514.9394471476. The cubic root of 42444436 is about 348.8244533855.

The spelling of 42444436 in words is "forty-two million, four hundred forty-four thousand, four hundred thirty-six".