30143444 has 6 divisors (see below), whose sum is σ = 52751034. Its totient is φ = 15071720.

The previous prime is 30143437. The next prime is 30143447. The reversal of 30143444 is 44434103.

It can be written as a sum of positive squares in only one way, i.e., 28751044 + 1392400 = 5362^2 + 1180^2 .

It is a super-2 number, since 2×30143444² = 1817254432362272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30143447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3767927 + ... + 3767934.

It is an arithmetic number, because the mean of its divisors is an integer number (8791839).

Almost surely, 2^30143444 is an apocalyptic number.

It is an amenable number.

30143444 is a deficient number, since it is larger than the sum of its proper divisors (22607590).

30143444 is a wasteful number, since it uses less digits than its factorization.

30143444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7535865 (or 7535863 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 30143444 is about 5490.3045452871. The cubic root of 30143444 is about 311.2177009865.

Adding to 30143444 its reverse (44434103), we get a palindrome (74577547).

The spelling of 30143444 in words is "thirty million, one hundred forty-three thousand, four hundred forty-four".