30390913 has 8 divisors (see below), whose sum is σ = 34785728. Its totient is φ = 26009424.

The previous prime is 30390907. The next prime is 30390923. The reversal of 30390913 is 31909303.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30390913 - 2⁹ = 30390401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30390923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2170 + ... + 8092.

It is an arithmetic number, because the mean of its divisors is an integer number (4348216).

Almost surely, 2^30390913 is an apocalyptic number.

It is an amenable number.

30390913 is a deficient number, since it is larger than the sum of its proper divisors (4394815).

30390913 is an equidigital number, since it uses as much as digits as its factorization.

30390913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6663.

The product of its (nonzero) digits is 2187, while the sum is 28.

The square root of 30390913 is about 5512.7953889111. The cubic root of 30390913 is about 312.0670501579.

The spelling of 30390913 in words is "thirty million, three hundred ninety thousand, nine hundred thirteen".