42490338 has 48 divisors (see below), whose sum is σ = 96991776. Its totient is φ = 12305920.

The previous prime is 42490337. The next prime is 42490417. The reversal of 42490338 is 83309424.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 42490299 and 42490308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42490333) 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 23 ways as a sum of consecutive naturals, for example, 34306 + ... + 35522.

It is an arithmetic number, because the mean of its divisors is an integer number (2020662).

Almost surely, 2^42490338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42490338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48495888).

42490338 is an abundant number, since it is smaller than the sum of its proper divisors (54501438).

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

42490338 is a wasteful number, since it uses less digits than its factorization.

42490338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279 (or 1256 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 42490338 is about 6518.4613215083. The cubic root of 42490338 is about 348.9501547574.

Adding to 42490338 its sum of digits (33), we get a triangular number (42490371 = T₉₂₁₈).

The spelling of 42490338 in words is "forty-two million, four hundred ninety thousand, three hundred thirty-eight".