30718442 has 4 divisors (see below), whose sum is σ = 46077666. Its totient is φ = 15359220.

The previous prime is 30718423. The next prime is 30718447. The reversal of 30718442 is 24481703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24481703 = 229 ⋅106907.

It can be written as a sum of positive squares in only one way, i.e., 30459361 + 259081 = 5519^2 + 509^2 .

It is not an unprimeable number, because it can be changed into a prime (30718447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7679609 + ... + 7679612.

Almost surely, 2^30718442 is an apocalyptic number.

30718442 is a deficient number, since it is larger than the sum of its proper divisors (15359224).

30718442 is a wasteful number, since it uses less digits than its factorization.

30718442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15359223.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 30718442 is about 5542.4220337322. The cubic root of 30718442 is about 313.1841166174.

The spelling of 30718442 in words is "thirty million, seven hundred eighteen thousand, four hundred forty-two".