42642344 has 8 divisors (see below), whose sum is σ = 79954410. Its totient is φ = 21321168.

The previous prime is 42642343. The next prime is 42642359. The reversal of 42642344 is 44324624.

It can be written as a sum of positive squares in only one way, i.e., 42640900 + 1444 = 6530^2 + 38^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (42642343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2665139 + ... + 2665154.

Almost surely, 2^42642344 is an apocalyptic number.

It is an amenable number.

42642344 is a deficient number, since it is larger than the sum of its proper divisors (37312066).

42642344 is a wasteful number, since it uses less digits than its factorization.

42642344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5330299 (or 5330295 counting only the distinct ones).

The product of its digits is 18432, while the sum is 29.

The square root of 42642344 is about 6530.1105656796. The cubic root of 42642344 is about 349.3657738781.

Adding to 42642344 its reverse (44324624), we get a palindrome (86966968).

The spelling of 42642344 in words is "forty-two million, six hundred forty-two thousand, three hundred forty-four".