42865770 has 48 divisors (see below), whose sum is σ = 106610400. Its totient is φ = 11030208.

The previous prime is 42865769. The next prime is 42865807. The reversal of 42865770 is 7756824.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24381 + ... + 26079.

It is an arithmetic number, because the mean of its divisors is an integer number (2221050).

Almost surely, 2^42865770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42865770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53305200).

42865770 is an abundant number, since it is smaller than the sum of its proper divisors (63744630).

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

42865770 is a wasteful number, since it uses less digits than its factorization.

42865770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767 (or 1738 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 42865770 is about 6547.1955828431. The cubic root of 42865770 is about 349.9748825513.

The spelling of 42865770 in words is "forty-two million, eight hundred sixty-five thousand, seven hundred seventy".