30430381 has 4 divisors (see below), whose sum is σ = 32032000. Its totient is φ = 28828764.

The previous prime is 30430349. The next prime is 30430409. The reversal of 30430381 is 18303403.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30430381 - 2⁵ = 30430349 is a prime.

It is a super-2 number, since 2×30430381² = 1852016175610322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30430331) 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, 800781 + ... + 800818.

It is an arithmetic number, because the mean of its divisors is an integer number (8008000).

Almost surely, 2^30430381 is an apocalyptic number.

It is an amenable number.

30430381 is a deficient number, since it is larger than the sum of its proper divisors (1601619).

30430381 is a wasteful number, since it uses less digits than its factorization.

30430381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601618.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 30430381 is about 5516.3738995829. The cubic root of 30430381 is about 312.2020832228.

Adding to 30430381 its reverse (18303403), we get a palindrome (48733784).

The spelling of 30430381 in words is "thirty million, four hundred thirty thousand, three hundred eighty-one".