30938140 has 12 divisors (see below), whose sum is σ = 64970136. Its totient is φ = 12375248.

The previous prime is 30938111. The next prime is 30938153. The reversal of 30938140 is 4183903.

It is a junction number, because it is equal to n+sod(n) for n = 30938099 and 30938108.

It is a congruent 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, 773434 + ... + 773473.

It is an arithmetic number, because the mean of its divisors is an integer number (5414178).

Almost surely, 2^30938140 is an apocalyptic number.

It is an amenable number.

30938140 is an abundant number, since it is smaller than the sum of its proper divisors (34031996).

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

30938140 is a wasteful number, since it uses less digits than its factorization.

30938140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546916 (or 1546914 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 30938140 is about 5562.2063967458. The cubic root of 30938140 is about 313.9289736169.

The spelling of 30938140 in words is "thirty million, nine hundred thirty-eight thousand, one hundred forty".