30142404 has 36 divisors (see below), whose sum is σ = 76360284. Its totient is φ = 10025472.

The previous prime is 30142403. The next prime is 30142423. The reversal of 30142404 is 40424103.

It can be written as a sum of positive squares in 2 ways, for example, as 28068804 + 2073600 = 5298^2 + 1440^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30142403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30364 + ... + 31340.

It is an arithmetic number, because the mean of its divisors is an integer number (2121119).

Almost surely, 2^30142404 is an apocalyptic number.

It is an amenable number.

30142404 is an abundant number, since it is smaller than the sum of its proper divisors (46217880).

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

30142404 is a wasteful number, since it uses less digits than its factorization.

30142404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844 (or 1839 counting only the distinct ones).

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

The square root of 30142404 is about 5490.2098320556. The cubic root of 30142404 is about 311.2141217656.

Adding to 30142404 its reverse (40424103), we get a palindrome (70566507).

The spelling of 30142404 in words is "thirty million, one hundred forty-two thousand, four hundred four".