42449664 has 72 divisors (see below), whose sum is σ = 116687872. Its totient is φ = 13685760.

The previous prime is 42449647. The next prime is 42449683. The reversal of 42449664 is 46694424.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22917 + ... + 24699.

Almost surely, 2^42449664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42449664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58343936).

42449664 is an abundant number, since it is smaller than the sum of its proper divisors (74238208).

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

42449664 is a wasteful number, since it uses less digits than its factorization.

42449664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833 (or 1819 counting only the distinct ones).

The product of its digits is 165888, while the sum is 39.

The square root of 42449664 is about 6515.3406664579. The cubic root of 42449664 is about 348.8387746923.

The spelling of 42449664 in words is "forty-two million, four hundred forty-nine thousand, six hundred sixty-four".