42287856 has 80 divisors (see below), whose sum is σ = 118638240. Its totient is φ = 12979200.

The previous prime is 42287821. The next prime is 42287879. The reversal of 42287856 is 65878224.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105256 + ... + 105656.

It is an arithmetic number, because the mean of its divisors is an integer number (1482978).

Almost surely, 2^42287856 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 42287856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59319120).

42287856 is an abundant number, since it is smaller than the sum of its proper divisors (76350384).

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

42287856 is a wasteful number, since it uses less digits than its factorization.

42287856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 419 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 42287856 is about 6502.9113480041. The cubic root of 42287856 is about 348.3949802499.

The spelling of 42287856 in words is "forty-two million, two hundred eighty-seven thousand, eight hundred fifty-six".