30390957 has 20 divisors (see below), whose sum is σ = 45553596. Its totient is φ = 20191680.

The previous prime is 30390953. The next prime is 30390967. The reversal of 30390957 is 75909303.

It can be written as a sum of positive squares in 2 ways, for example, as 17816841 + 12574116 = 4221^2 + 3546^2 .

It is not a de Polignac number, because 30390957 - 2² = 30390953 is a prime.

It is a super-2 number, since 2×30390957² = 1847220534751698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30390953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36607 + ... + 37427.

Almost surely, 2^30390957 is an apocalyptic number.

It is an amenable number.

30390957 is a deficient number, since it is larger than the sum of its proper divisors (15162639).

30390957 is an equidigital number, since it uses as much as digits as its factorization.

30390957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290 (or 1281 counting only the distinct ones).

The product of its (nonzero) digits is 25515, while the sum is 36.

The square root of 30390957 is about 5512.7993796256. The cubic root of 30390957 is about 312.0672007615.

The spelling of 30390957 in words is "thirty million, three hundred ninety thousand, nine hundred fifty-seven".