42444866 has 4 divisors (see below), whose sum is σ = 63667302. Its totient is φ = 21222432.

The previous prime is 42444839. The next prime is 42444877. The reversal of 42444866 is 66844424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 41280625 + 1164241 = 6425^2 + 1079^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611215 + ... + 10611218.

Almost surely, 2^42444866 is an apocalyptic number.

42444866 is a deficient number, since it is larger than the sum of its proper divisors (21222436).

42444866 is a wasteful number, since it uses less digits than its factorization.

42444866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21222435.

The product of its digits is 147456, while the sum is 38.

The square root of 42444866 is about 6514.9724481382. The cubic root of 42444866 is about 348.8256313491.

The spelling of 42444866 in words is "forty-two million, four hundred forty-four thousand, eight hundred sixty-six".