30420242 has 8 divisors (see below), whose sum is σ = 48314556. Its totient is φ = 14315392.

The previous prime is 30420241. The next prime is 30420277. The reversal of 30420242 is 24202403.

It can be written as a sum of positive squares in 2 ways, for example, as 27888961 + 2531281 = 5281^2 + 1591^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×30420242² = 1850782246677128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 30420242.

It is not an unprimeable number, because it can be changed into a prime (30420241) 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, 447323 + ... + 447390.

Almost surely, 2^30420242 is an apocalyptic number.

30420242 is a deficient number, since it is larger than the sum of its proper divisors (17894314).

30420242 is a wasteful number, since it uses less digits than its factorization.

30420242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894732.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 30420242 is about 5515.4548316526. The cubic root of 30420242 is about 312.1674055045.

Adding to 30420242 its reverse (24202403), we get a palindrome (54622645).

The spelling of 30420242 in words is "thirty million, four hundred twenty thousand, two hundred forty-two".