30785125 has 32 divisors (see below), whose sum is σ = 44388864. Its totient is φ = 20880000.

The previous prime is 30785123. The next prime is 30785129. The reversal of 30785125 is 52158703.

It is not a de Polignac number, because 30785125 - 2¹ = 30785123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30785123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132009 + ... + 132241.

It is an arithmetic number, because the mean of its divisors is an integer number (1387152).

Almost surely, 2^30785125 is an apocalyptic number.

30785125 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30785125 is a deficient number, since it is larger than the sum of its proper divisors (13603739).

30785125 is a wasteful number, since it uses less digits than its factorization.

30785125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 30785125 is about 5548.4344638826. The cubic root of 30785125 is about 313.4105708440.

The spelling of 30785125 in words is "thirty million, seven hundred eighty-five thousand, one hundred twenty-five".