30143746 has 4 divisors (see below), whose sum is σ = 45215622. Its totient is φ = 15071872.

The previous prime is 30143741. The next prime is 30143759. The reversal of 30143746 is 64734103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22934521 + 7209225 = 4789^2 + 2685^2 .

It is not an unprimeable number, because it can be changed into a prime (30143741) 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 as a sum of consecutive naturals, namely, 7535935 + ... + 7535938.

Almost surely, 2^30143746 is an apocalyptic number.

30143746 is a deficient number, since it is larger than the sum of its proper divisors (15071876).

30143746 is a wasteful number, since it uses less digits than its factorization.

30143746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15071875.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 30143746 is about 5490.3320482463. The cubic root of 30143746 is about 311.2187403217.

Adding to 30143746 its reverse (64734103), we get a palindrome (94877849).

The spelling of 30143746 in words is "thirty million, one hundred forty-three thousand, seven hundred forty-six".