30403144 has 8 divisors (see below), whose sum is σ = 57005910. Its totient is φ = 15201568.

The previous prime is 30403141. The next prime is 30403147. The reversal of 30403144 is 44130403.

It is an interprime number because it is at equal distance from previous prime (30403141) and next prime (30403147).

It can be written as a sum of positive squares in only one way, i.e., 26936100 + 3467044 = 5190^2 + 1862^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (30403141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1900189 + ... + 1900204.

Almost surely, 2^30403144 is an apocalyptic number.

It is an amenable number.

30403144 is a deficient number, since it is larger than the sum of its proper divisors (26602766).

30403144 is a wasteful number, since it uses less digits than its factorization.

30403144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3800399 (or 3800395 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 30403144 is about 5513.9046056311. The cubic root of 30403144 is about 312.1089089438.

Adding to 30403144 its reverse (44130403), we get a palindrome (74533547).

The spelling of 30403144 in words is "thirty million, four hundred three thousand, one hundred forty-four".