30161838 has 16 divisors (see below), whose sum is σ = 68941440. Its totient is φ = 8617656.

The previous prime is 30161801. The next prime is 30161849. The reversal of 30161838 is 83816103.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

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, 359028 + ... + 359111.

It is an arithmetic number, because the mean of its divisors is an integer number (4308840).

Almost surely, 2^30161838 is an apocalyptic number.

30161838 is an abundant number, since it is smaller than the sum of its proper divisors (38779602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30161838 is a wasteful number, since it uses less digits than its factorization.

30161838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718151.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 30161838 is about 5491.9794245791. The cubic root of 30161838 is about 311.2809914141.

The spelling of 30161838 in words is "thirty million, one hundred sixty-one thousand, eight hundred thirty-eight".