42117784 has 16 divisors (see below), whose sum is σ = 82404720. Its totient is φ = 20143200.

The previous prime is 42117767. The next prime is 42117791. The reversal of 42117784 is 48771124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114267 + ... + 114634.

It is an arithmetic number, because the mean of its divisors is an integer number (5150295).

Almost surely, 2^42117784 is an apocalyptic number.

It is an amenable number.

42117784 is a deficient number, since it is larger than the sum of its proper divisors (40286936).

42117784 is a wasteful number, since it uses less digits than its factorization.

42117784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228930 (or 228926 counting only the distinct ones).

The product of its digits is 12544, while the sum is 34.

The square root of 42117784 is about 6489.8215691959. The cubic root of 42117784 is about 347.9272979759.

The spelling of 42117784 in words is "forty-two million, one hundred seventeen thousand, seven hundred eighty-four".