42811788 has 48 divisors (see below), whose sum is σ = 105840000. Its totient is φ = 13431168.

The previous prime is 42811777. The next prime is 42811817. The reversal of 42811788 is 88711824.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40288 + ... + 41336.

It is an arithmetic number, because the mean of its divisors is an integer number (2205000).

Almost surely, 2^42811788 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 42811788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52920000).

42811788 is an abundant number, since it is smaller than the sum of its proper divisors (63028212).

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

42811788 is a wasteful number, since it uses less digits than its factorization.

42811788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254 (or 1252 counting only the distinct ones).

The product of its digits is 28672, while the sum is 39.

The square root of 42811788 is about 6543.0717556817. The cubic root of 42811788 is about 349.8279099575.

The spelling of 42811788 in words is "forty-two million, eight hundred eleven thousand, seven hundred eighty-eight".