30191090 has 8 divisors (see below), whose sum is σ = 54343980. Its totient is φ = 12076432.

The previous prime is 30191081. The next prime is 30191123. The reversal of 30191090 is 9019103.

It can be written as a sum of positive squares in 2 ways, for example, as 24512401 + 5678689 = 4951^2 + 2383^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1509545 + ... + 1509564.

Almost surely, 2^30191090 is an apocalyptic number.

30191090 is a deficient number, since it is larger than the sum of its proper divisors (24152890).

30191090 is a wasteful number, since it uses less digits than its factorization.

30191090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3019116.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 30191090 is about 5494.6419355587. The cubic root of 30191090 is about 311.3815892790.

The spelling of 30191090 in words is "thirty million, one hundred ninety-one thousand, ninety".