142638028 has 24 divisors (see below), whose sum is σ = 270425120. Its totient is φ = 65828880.

The previous prime is 142638011. The next prime is 142638043. The reversal of 142638028 is 820836241.

It is a junction number, because it is equal to n+sod(n) for n = 142637984 and 142638002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673 + ... + 16903.

Almost surely, 2^142638028 is an apocalyptic number.

It is an amenable number.

142638028 is a deficient number, since it is larger than the sum of its proper divisors (127787092).

142638028 is a wasteful number, since it uses less digits than its factorization.

142638028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16274 (or 16246 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 142638028 is about 11943.1163437354. The cubic root of 142638028 is about 522.4905523959.

The spelling of 142638028 in words is "one hundred forty-two million, six hundred thirty-eight thousand, twenty-eight".