42011320 has 64 divisors (see below), whose sum is σ = 102604320. Its totient is φ = 15389184.

The previous prime is 42011311. The next prime is 42011323. The reversal of 42011320 is 2311024.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 42011320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42011323) 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, 89727 + ... + 90193.

Almost surely, 2^42011320 is an apocalyptic number.

42011320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42011320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51302160).

42011320 is an abundant number, since it is smaller than the sum of its proper divisors (60593000).

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

42011320 is a wasteful number, since it uses less digits than its factorization.

42011320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 42011320 is about 6481.6139965290. The cubic root of 42011320 is about 347.6338907482.

Adding to 42011320 its reverse (2311024), we get a palindrome (44322344).

The spelling of 42011320 in words is "forty-two million, eleven thousand, three hundred twenty".