42811900 has 36 divisors (see below), whose sum is σ = 93388120. Its totient is φ = 17035200.

The previous prime is 42811891. The next prime is 42811907. The reversal of 42811900 is 911824.

It is a happy number.

42811900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42811900² = 3665717563220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42811907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20086 + ... + 22114.

Almost surely, 2^42811900 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 42811900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46694060).

42811900 is an abundant number, since it is smaller than the sum of its proper divisors (50576220).

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

42811900 is a wasteful number, since it uses less digits than its factorization.

42811900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254 (or 2247 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 42811900 is about 6543.0803143474. The cubic root of 42811900 is about 349.8282150190.

The spelling of 42811900 in words is "forty-two million, eight hundred eleven thousand, nine hundred".