30979242 has 48 divisors (see below), whose sum is σ = 78174720. Its totient is φ = 8682336.

The previous prime is 30979241. The next prime is 30979243. The reversal of 30979242 is 24297903.

It is an interprime number because it is at equal distance from previous prime (30979241) and next prime (30979243).

It is a junction number, because it is equal to n+sod(n) for n = 30979197 and 30979206.

It is not an unprimeable number, because it can be changed into a prime (30979241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4359 + ... + 8997.

It is an arithmetic number, because the mean of its divisors is an integer number (1628640).

Almost surely, 2^30979242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30979242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39087360).

30979242 is an abundant number, since it is smaller than the sum of its proper divisors (47195478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30979242 is a wasteful number, since it uses less digits than its factorization.

30979242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4707 (or 4704 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 30979242 is about 5565.8999272355. The cubic root of 30979242 is about 314.0679326156.

The spelling of 30979242 in words is "thirty million, nine hundred seventy-nine thousand, two hundred forty-two".