42455538 has 24 divisors (see below), whose sum is σ = 96829200. Its totient is φ = 13406904.

The previous prime is 42455537. The next prime is 42455551. The reversal of 42455538 is 83555424.

It is not an unprimeable number, because it can be changed into a prime (42455531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61728 + ... + 62411.

It is an arithmetic number, because the mean of its divisors is an integer number (4034550).

Almost surely, 2^42455538 is an apocalyptic number.

42455538 is an abundant number, since it is smaller than the sum of its proper divisors (54373662).

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

42455538 is a wasteful number, since it uses less digits than its factorization.

42455538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124166 (or 124163 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The square root of 42455538 is about 6515.7914331261. The cubic root of 42455538 is about 348.8548642147.

It can be divided in two parts, 4 and 2455538, that added together give a palindrome (2455542).

The spelling of 42455538 in words is "forty-two million, four hundred fifty-five thousand, five hundred thirty-eight".