42428066 has 8 divisors (see below), whose sum is σ = 63673500. Its totient is φ = 21203568.

The previous prime is 42428059. The next prime is 42428081. The reversal of 42428066 is 66082424.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40386025 + 2042041 = 6355^2 + 1429^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1640 + ... + 9356.

Almost surely, 2^42428066 is an apocalyptic number.

42428066 is a deficient number, since it is larger than the sum of its proper divisors (21245434).

42428066 is a wasteful number, since it uses less digits than its factorization.

42428066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10468.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 42428066 is about 6513.6829827679. The cubic root of 42428066 is about 348.7796026653.

The spelling of 42428066 in words is "forty-two million, four hundred twenty-eight thousand, sixty-six".