30144893 has 4 divisors (see below), whose sum is σ = 31918140. Its totient is φ = 28371648.

The previous prime is 30144889. The next prime is 30144911. The reversal of 30144893 is 39844103.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19731364 + 10413529 = 4442^2 + 3227^2 .

It is a cyclic number.

It is not a de Polignac number, because 30144893 - 2² = 30144889 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30144823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 886598 + ... + 886631.

It is an arithmetic number, because the mean of its divisors is an integer number (7979535).

Almost surely, 2^30144893 is an apocalyptic number.

It is an amenable number.

30144893 is a deficient number, since it is larger than the sum of its proper divisors (1773247).

30144893 is a wasteful number, since it uses less digits than its factorization.

30144893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773246.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 30144893 is about 5490.4365035942. The cubic root of 30144893 is about 311.2226876675. Note that the first 3 decimals are identical.

Adding to 30144893 its reverse (39844103), we get a palindrome (69988996).

The spelling of 30144893 in words is "thirty million, one hundred forty-four thousand, eight hundred ninety-three".