30404142 has 36 divisors (see below), whose sum is σ = 69540120. Its totient is φ = 9599256.

The previous prime is 30404111. The next prime is 30404167. The reversal of 30404142 is 24140403.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4159 + ... + 8837.

It is an arithmetic number, because the mean of its divisors is an integer number (1931670).

Almost surely, 2^30404142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30404142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34770060).

30404142 is an abundant number, since it is smaller than the sum of its proper divisors (39135978).

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

30404142 is a wasteful number, since it uses less digits than its factorization.

30404142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4725 (or 4703 counting only the distinct ones).

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

The square root of 30404142 is about 5513.9951033711. The cubic root of 30404142 is about 312.1123239555.

Adding to 30404142 its reverse (24140403), we get a palindrome (54544545).

The spelling of 30404142 in words is "thirty million, four hundred four thousand, one hundred forty-two".