42428338 has 4 divisors (see below), whose sum is σ = 63642510. Its totient is φ = 21214168.

The previous prime is 42428333. The next prime is 42428339. The reversal of 42428338 is 83382424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 38278969 + 4149369 = 6187^2 + 2037^2 .

It is not an unprimeable number, because it can be changed into a prime (42428333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607083 + ... + 10607086.

Almost surely, 2^42428338 is an apocalyptic number.

42428338 is a deficient number, since it is larger than the sum of its proper divisors (21214172).

42428338 is a wasteful number, since it uses less digits than its factorization.

42428338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21214171.

The product of its digits is 36864, while the sum is 34.

The square root of 42428338 is about 6513.7038618592. The cubic root of 42428338 is about 348.7803479883.

The spelling of 42428338 in words is "forty-two million, four hundred twenty-eight thousand, three hundred thirty-eight".