42811538 has 32 divisors (see below), whose sum is σ = 80870400. Its totient is φ = 16511760.

The previous prime is 42811537. The next prime is 42811543. The reversal of 42811538 is 83511824.

It is not an unprimeable number, because it can be changed into a prime (42811537) 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, 14513 + ... + 17211.

It is an arithmetic number, because the mean of its divisors is an integer number (2527200).

Almost surely, 2^42811538 is an apocalyptic number.

42811538 is a deficient number, since it is larger than the sum of its proper divisors (38058862).

42811538 is a wasteful number, since it uses less digits than its factorization.

42811538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822.

The product of its digits is 7680, while the sum is 32.

The square root of 42811538 is about 6543.0526514770. The cubic root of 42811538 is about 349.8272290146.

The spelling of 42811538 in words is "forty-two million, eight hundred eleven thousand, five hundred thirty-eight".