42856770 has 64 divisors (see below), whose sum is σ = 114099840. Its totient is φ = 10214400.

The previous prime is 42856769. The next prime is 42856777. The reversal of 42856770 is 7765824.

It is not an unprimeable number, because it can be changed into a prime (42856777) 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, 19066 + ... + 21194.

It is an arithmetic number, because the mean of its divisors is an integer number (1782810).

Almost surely, 2^42856770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42856770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57049920).

42856770 is an abundant number, since it is smaller than the sum of its proper divisors (71243070).

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

42856770 is a wasteful number, since it uses less digits than its factorization.

42856770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211.

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

The square root of 42856770 is about 6546.5082295832. The cubic root of 42856770 is about 349.9503875256.

The spelling of 42856770 in words is "forty-two million, eight hundred fifty-six thousand, seven hundred seventy".