42240056 has 8 divisors (see below), whose sum is σ = 79200120. Its totient is φ = 21120024.

The previous prime is 42240049. The next prime is 42240089. The reversal of 42240056 is 65004224.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2639996 + ... + 2640011.

It is an arithmetic number, because the mean of its divisors is an integer number (9900015).

Almost surely, 2^42240056 is an apocalyptic number.

It is an amenable number.

42240056 is a deficient number, since it is larger than the sum of its proper divisors (36960064).

42240056 is a wasteful number, since it uses less digits than its factorization.

42240056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280013 (or 5280009 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 42240056 is about 6499.2350319095. The cubic root of 42240056 is about 348.2636615512.

The spelling of 42240056 in words is "forty-two million, two hundred forty thousand, fifty-six".