42620556 has 72 divisors (see below), whose sum is σ = 110602800. Its totient is φ = 12763520.

The previous prime is 42620551. The next prime is 42620569. The reversal of 42620556 is 65502624.

It is not an unprimeable number, because it can be changed into a prime (42620551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216250 + ... + 216446.

It is an arithmetic number, because the mean of its divisors is an integer number (1536150).

Almost surely, 2^42620556 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 42620556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55301400).

42620556 is an abundant number, since it is smaller than the sum of its proper divisors (67982244).

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

42620556 is a wasteful number, since it uses less digits than its factorization.

42620556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 42620556 is about 6528.4420806192. The cubic root of 42620556 is about 349.3062612155.

The spelling of 42620556 in words is "forty-two million, six hundred twenty thousand, five hundred fifty-six".