42563844 has 36 divisors (see below), whose sum is σ = 107805516. Its totient is φ = 14159808.

The previous prime is 42563831. The next prime is 42563849. The reversal of 42563844 is 44836524.

It can be written as a sum of positive squares in 2 ways, for example, as 36000000 + 6563844 = 6000^2 + 2562^2 .

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 a junction number, because it is equal to n+sod(n) for n = 42563799 and 42563808.

It is not an unprimeable number, because it can be changed into a prime (42563849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25582 + ... + 27194.

Almost surely, 2^42563844 is an apocalyptic number.

It is an amenable number.

42563844 is an abundant number, since it is smaller than the sum of its proper divisors (65241672).

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

42563844 is a wasteful number, since it uses less digits than its factorization.

42563844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2356 (or 2351 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The square root of 42563844 is about 6524.0971789206. The cubic root of 42563844 is about 349.1512605027.

It can be divided in two parts, 4256 and 3844, that added together give a square (8100 = 90²).

The spelling of 42563844 in words is "forty-two million, five hundred sixty-three thousand, eight hundred forty-four".