30918242 has 12 divisors (see below), whose sum is σ = 47187366. Its totient is φ = 15193680.

The previous prime is 30918241. The next prime is 30918287. The reversal of 30918242 is 24281903.

It can be written as a sum of positive squares in only one way, i.e., 27573001 + 3345241 = 5251^2 + 1829^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (30918241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4742 + ... + 9182.

Almost surely, 2^30918242 is an apocalyptic number.

30918242 is a deficient number, since it is larger than the sum of its proper divisors (16269124).

30918242 is an equidigital number, since it uses as much as digits as its factorization.

30918242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4561 (or 4502 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 30918242 is about 5560.4174303734. The cubic root of 30918242 is about 313.8616575861.

The spelling of 30918242 in words is "thirty million, nine hundred eighteen thousand, two hundred forty-two".