42644402 has 4 divisors (see below), whose sum is σ = 63966606. Its totient is φ = 21322200.

The previous prime is 42644389. The next prime is 42644411. The reversal of 42644402 is 20444624.

42644402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 29691601 + 12952801 = 5449^2 + 3599^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661099 + ... + 10661102.

Almost surely, 2^42644402 is an apocalyptic number.

42644402 is a deficient number, since it is larger than the sum of its proper divisors (21322204).

42644402 is a wasteful number, since it uses less digits than its factorization.

42644402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21322203.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 42644402 is about 6530.2681415084. The cubic root of 42644402 is about 349.3713941382.

The spelling of 42644402 in words is "forty-two million, six hundred forty-four thousand, four hundred two".