30885938 has 4 divisors (see below), whose sum is σ = 46328910. Its totient is φ = 15442968.

The previous prime is 30885929. The next prime is 30885949. The reversal of 30885938 is 83958803.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83958803 = 173 ⋅485311.

It can be written as a sum of positive squares in only one way, i.e., 30063289 + 822649 = 5483^2 + 907^2 .

It is a super-2 number, since 2×30885938² = 1907882332279688, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7721483 + ... + 7721486.

Almost surely, 2^30885938 is an apocalyptic number.

30885938 is a deficient number, since it is larger than the sum of its proper divisors (15442972).

30885938 is a wasteful number, since it uses less digits than its factorization.

30885938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15442971.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 30885938 is about 5557.5118533387. The cubic root of 30885938 is about 313.7523098405.

The spelling of 30885938 in words is "thirty million, eight hundred eighty-five thousand, nine hundred thirty-eight".