30040042 has 8 divisors (see below), whose sum is σ = 45084996. Its totient is φ = 15011712.

The previous prime is 30040013. The next prime is 30040057. The reversal of 30040042 is 24004003.

It can be written as a sum of positive squares in 2 ways, for example, as 28504921 + 1535121 = 5339^2 + 1239^2 .

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, 2488 + ... + 8140.

Almost surely, 2^30040042 is an apocalyptic number.

30040042 is a deficient number, since it is larger than the sum of its proper divisors (15044954).

30040042 is a wasteful number, since it uses less digits than its factorization.

30040042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8312.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 30040042 is about 5480.8796739210. The cubic root of 30040042 is about 310.8614333612.

Adding to 30040042 its reverse (24004003), we get a palindrome (54044045).

The spelling of 30040042 in words is "thirty million, forty thousand, forty-two", and thus it is an eban number.