30942945 has 64 divisors (see below), whose sum is σ = 61102080. Its totient is φ = 14731200.

The previous prime is 30942943. The next prime is 30942949. The reversal of 30942945 is 54924903.

It is not a de Polignac number, because 30942945 - 2¹ = 30942943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30942943) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 99340 + ... + 99650.

It is an arithmetic number, because the mean of its divisors is an integer number (954720).

Almost surely, 2^30942945 is an apocalyptic number.

It is an amenable number.

30942945 is a deficient number, since it is larger than the sum of its proper divisors (30159135).

30942945 is a wasteful number, since it uses less digits than its factorization.

30942945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 30942945 is about 5562.6383128872. The cubic root of 30942945 is about 313.9452248701.

The spelling of 30942945 in words is "thirty million, nine hundred forty-two thousand, nine hundred forty-five".