42347856 has 20 divisors (see below), whose sum is σ = 109398752. Its totient is φ = 14115936.

The previous prime is 42347849. The next prime is 42347873. The reversal of 42347856 is 65874324.

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 3 ways as a sum of consecutive naturals, for example, 441076 + ... + 441171.

Almost surely, 2^42347856 is an apocalyptic number.

It is an amenable number.

42347856 is an abundant number, since it is smaller than the sum of its proper divisors (67050896).

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

42347856 is a wasteful number, since it uses less digits than its factorization.

42347856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882258 (or 882252 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The square root of 42347856 is about 6507.5230310772. The cubic root of 42347856 is about 348.5596754461.

It can be divided in two parts, 4234 and 7856, that added together give a triangular number (12090 = T₁₅₅).

The spelling of 42347856 in words is "forty-two million, three hundred forty-seven thousand, eight hundred fifty-six".