42856884 has 96 divisors (see below), whose sum is σ = 128701440. Its totient is φ = 12079584.

The previous prime is 42856873. The next prime is 42856901. The reversal of 42856884 is 48865824.

42856884 is a `hidden beast` number, since 4 + 2 + 8 + 568 + 84 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62407 + ... + 63089.

It is an arithmetic number, because the mean of its divisors is an integer number (1340640).

Almost surely, 2^42856884 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 42856884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64350720).

42856884 is an abundant number, since it is smaller than the sum of its proper divisors (85844556).

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

42856884 is a wasteful number, since it uses less digits than its factorization.

42856884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786 (or 778 counting only the distinct ones).

The product of its digits is 491520, while the sum is 45.

The square root of 42856884 is about 6546.5169365091. The cubic root of 42856884 is about 349.9506978174.

The spelling of 42856884 in words is "forty-two million, eight hundred fifty-six thousand, eight hundred eighty-four".