30188042 has 8 divisors (see below), whose sum is σ = 45325956. Its totient is φ = 15079392.

The previous prime is 30188023. The next prime is 30188047. The reversal of 30188042 is 24088103.

It can be written as a sum of positive squares in 2 ways, for example, as 27994681 + 2193361 = 5291^2 + 1481^2 .

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

It is a super-2 number, since 2×30188042² = 1822635759587528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30188047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4523 + ... + 8990.

Almost surely, 2^30188042 is an apocalyptic number.

30188042 is a deficient number, since it is larger than the sum of its proper divisors (15137914).

30188042 is a wasteful number, since it uses less digits than its factorization.

30188042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14632.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 30188042 is about 5494.3645674454. The cubic root of 30188042 is about 311.3711102157.

The spelling of 30188042 in words is "thirty million, one hundred eighty-eight thousand, forty-two".