42817780 has 24 divisors (see below), whose sum is σ = 90091008. Its totient is φ = 17094048.

The previous prime is 42817751. The next prime is 42817783. The reversal of 42817780 is 8771824.

42817780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42817783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10377 + ... + 13903.

It is an arithmetic number, because the mean of its divisors is an integer number (3753792).

Almost surely, 2^42817780 is an apocalyptic number.

It is an amenable number.

42817780 is an abundant number, since it is smaller than the sum of its proper divisors (47273228).

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

42817780 is a wasteful number, since it uses less digits than its factorization.

42817780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4143 (or 4141 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 42817780 is about 6543.5296285720. The cubic root of 42817780 is about 349.8442300035.

The spelling of 42817780 in words is "forty-two million, eight hundred seventeen thousand, seven hundred eighty".