30238393 has 4 divisors (see below), whose sum is σ = 32017140. Its totient is φ = 28459648.

The previous prime is 30238381. The next prime is 30238409. The reversal of 30238393 is 39383203.

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 26501904 + 3736489 = 5148^2 + 1933^2 .

It is a cyclic number.

It is not a de Polignac number, because 30238393 - 2²¹ = 28141241 is a prime.

It is a super-2 number, since 2×30238393² = 1828720822444898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30238303) 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, 889348 + ... + 889381.

It is an arithmetic number, because the mean of its divisors is an integer number (8004285).

Almost surely, 2^30238393 is an apocalyptic number.

It is an amenable number.

30238393 is a deficient number, since it is larger than the sum of its proper divisors (1778747).

30238393 is a wasteful number, since it uses less digits than its factorization.

30238393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778746.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 30238393 is about 5498.9447169434. The cubic root of 30238393 is about 311.5441272712.

The spelling of 30238393 in words is "thirty million, two hundred thirty-eight thousand, three hundred ninety-three".