42404432 has 40 divisors (see below), whose sum is σ = 94345152. Its totient is φ = 18086400.

The previous prime is 42404431. The next prime is 42404471. The reversal of 42404432 is 23440424.

It is a junction number, because it is equal to n+sod(n) for n = 42404398 and 42404407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42404431) 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, 26207 + ... + 27777.

Almost surely, 2^42404432 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 42404432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47172576).

42404432 is an abundant number, since it is smaller than the sum of its proper divisors (51940720).

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

42404432 is a wasteful number, since it uses less digits than its factorization.

42404432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827 (or 1821 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 42404432 is about 6511.8685490418. The cubic root of 42404432 is about 348.7148295961.

Adding to 42404432 its reverse (23440424), we get a palindrome (65844856).

The spelling of 42404432 in words is "forty-two million, four hundred four thousand, four hundred thirty-two".