42404736 has 64 divisors (see below), whose sum is σ = 122889600. Its totient is φ = 12848640.

The previous prime is 42404729. The next prime is 42404737. The reversal of 42404736 is 63740424.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42404737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 796 + ... + 9243.

It is an arithmetic number, because the mean of its divisors is an integer number (1920150).

Almost surely, 2^42404736 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 42404736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61444800).

42404736 is an abundant number, since it is smaller than the sum of its proper divisors (80484864).

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

42404736 is a wasteful number, since it uses less digits than its factorization.

42404736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10067 (or 10055 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 42404736 is about 6511.8918909945. The cubic root of 42404736 is about 348.7156629135.

The spelling of 42404736 in words is "forty-two million, four hundred four thousand, seven hundred thirty-six".