42550838 has 16 divisors (see below), whose sum is σ = 70944336. Its totient is φ = 18975840.

The previous prime is 42550831. The next prime is 42550877. The reversal of 42550838 is 83805524.

It is a junction number, because it is equal to n+sod(n) for n = 42550798 and 42550807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42550831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17081 + ... + 19412.

It is an arithmetic number, because the mean of its divisors is an integer number (4434021).

Almost surely, 2^42550838 is an apocalyptic number.

42550838 is a deficient number, since it is larger than the sum of its proper divisors (28393498).

42550838 is a wasteful number, since it uses less digits than its factorization.

42550838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36559.

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 42550838 is about 6523.1003364964. The cubic root of 42550838 is about 349.1156941356.

The spelling of 42550838 in words is "forty-two million, five hundred fifty thousand, eight hundred thirty-eight".