30206138 has 8 divisors (see below), whose sum is σ = 45332832. Its totient is φ = 15095196.

The previous prime is 30206119. The next prime is 30206147. The reversal of 30206138 is 83160203.

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

It is a Curzon number.

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, 4331 + ... + 8897.

It is an arithmetic number, because the mean of its divisors is an integer number (5666604).

Almost surely, 2^30206138 is an apocalyptic number.

30206138 is a deficient number, since it is larger than the sum of its proper divisors (15126694).

30206138 is a wasteful number, since it uses less digits than its factorization.

30206138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7876.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30206138 is about 5496.0110989699. The cubic root of 30206138 is about 311.4333141630.

The spelling of 30206138 in words is "thirty million, two hundred six thousand, one hundred thirty-eight".