43775442 has 48 divisors (see below), whose sum is σ = 103910040. Its totient is φ = 13257216.

The previous prime is 43775429. The next prime is 43775447. The reversal of 43775442 is 24457734.

43775442 is a `hidden beast` number, since 43 + 77 + 544 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 39200121 + 4575321 = 6261^2 + 2139^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43775397 and 43775406.

It is not an unprimeable number, because it can be changed into a prime (43775447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6408 + ... + 11340.

Almost surely, 2^43775442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43775442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51955020).

43775442 is an abundant number, since it is smaller than the sum of its proper divisors (60134598).

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

43775442 is a wasteful number, since it uses less digits than its factorization.

43775442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4987 (or 4984 counting only the distinct ones).

The product of its digits is 94080, while the sum is 36.

The square root of 43775442 is about 6616.3012325619. The cubic root of 43775442 is about 352.4332271289.

The spelling of 43775442 in words is "forty-three million, seven hundred seventy-five thousand, four hundred forty-two".