42775812 has 36 divisors (see below), whose sum is σ = 111859020. Its totient is φ = 13766592.

The previous prime is 42775801. The next prime is 42775829. The reversal of 42775812 is 21857724.

42775812 is a `hidden beast` number, since 4 + 2 + 77 + 581 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 34857216 + 7918596 = 5904^2 + 2814^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19443 + ... + 21530.

It is an arithmetic number, because the mean of its divisors is an integer number (3107195).

Almost surely, 2^42775812 is an apocalyptic number.

It is an amenable number.

42775812 is an abundant number, since it is smaller than the sum of its proper divisors (69083208).

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

42775812 is a wasteful number, since it uses less digits than its factorization.

42775812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41012 (or 41007 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 42775812 is about 6540.3220104212. The cubic root of 42775812 is about 349.7298922820.

The spelling of 42775812 in words is "forty-two million, seven hundred seventy-five thousand, eight hundred twelve".