42047656 has 64 divisors (see below), whose sum is σ = 94970880. Its totient is φ = 17072640.

The previous prime is 42047653. The next prime is 42047669. The reversal of 42047656 is 65674024.

It is not an unprimeable number, because it can be changed into a prime (42047653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91780 + ... + 92236.

It is an arithmetic number, because the mean of its divisors is an integer number (1483920).

Almost surely, 2^42047656 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 42047656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47485440).

42047656 is an abundant number, since it is smaller than the sum of its proper divisors (52923224).

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

42047656 is a wasteful number, since it uses less digits than its factorization.

42047656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 42047656 is about 6484.4163962534. The cubic root of 42047656 is about 347.7340858469.

The spelling of 42047656 in words is "forty-two million, forty-seven thousand, six hundred fifty-six".