42782740 has 96 divisors (see below), whose sum is σ = 120685824. Its totient is φ = 12303360.

The previous prime is 42782717. The next prime is 42782741. The reversal of 42782740 is 4728724.

It is a junction number, because it is equal to n+sod(n) for n = 42782696 and 42782705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42782741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18952 + ... + 21088.

It is an arithmetic number, because the mean of its divisors is an integer number (1257144).

Almost surely, 2^42782740 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 42782740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60342912).

42782740 is an abundant number, since it is smaller than the sum of its proper divisors (77903084).

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

42782740 is a wasteful number, since it uses less digits than its factorization.

42782740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2177 (or 2175 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 42782740 is about 6540.8516265086. The cubic root of 42782740 is about 349.7487720942.

The spelling of 42782740 in words is "forty-two million, seven hundred eighty-two thousand, seven hundred forty".