30122442 has 80 divisors (see below), whose sum is σ = 78198912. Its totient is φ = 8488800.

The previous prime is 30122423. The next prime is 30122447. The reversal of 30122442 is 24422103.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (30122447) 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 39 ways as a sum of consecutive naturals, for example, 114403 + ... + 114665.

Almost surely, 2^30122442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30122442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39099456).

30122442 is an abundant number, since it is smaller than the sum of its proper divisors (48076470).

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

30122442 is a wasteful number, since it uses less digits than its factorization.

30122442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 30122442 is about 5488.3915676635. The cubic root of 30122442 is about 311.1454054127.

Adding to 30122442 its reverse (24422103), we get a palindrome (54544545).

The spelling of 30122442 in words is "thirty million, one hundred twenty-two thousand, four hundred forty-two".