30928243 has 4 divisors (see below), whose sum is σ = 31217400. Its totient is φ = 30639088.

The previous prime is 30928241. The next prime is 30928259. The reversal of 30928243 is 34282903.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30928243 - 2¹ = 30928241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30928241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144418 + ... + 144631.

It is an arithmetic number, because the mean of its divisors is an integer number (7804350).

Almost surely, 2^30928243 is an apocalyptic number.

30928243 is a deficient number, since it is larger than the sum of its proper divisors (289157).

30928243 is a wasteful number, since it uses less digits than its factorization.

30928243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289156.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 30928243 is about 5561.3166606479. The cubic root of 30928243 is about 313.8954951293.

The spelling of 30928243 in words is "thirty million, nine hundred twenty-eight thousand, two hundred forty-three".