30890493 has 6 divisors (see below), whose sum is σ = 44619614. Its totient is φ = 20593656.

The previous prime is 30890459. The next prime is 30890521. The reversal of 30890493 is 39409803.

It can be written as a sum of positive squares in only one way, i.e., 20412324 + 10478169 = 4518^2 + 3237^2 .

It is not a de Polignac number, because 30890493 - 2⁶ = 30890429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30890413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1716130 + ... + 1716147.

Almost surely, 2^30890493 is an apocalyptic number.

It is an amenable number.

30890493 is a deficient number, since it is larger than the sum of its proper divisors (13729121).

30890493 is a wasteful number, since it uses less digits than its factorization.

30890493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3432283 (or 3432280 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 30890493 is about 5557.9216439241. The cubic root of 30890493 is about 313.7677329490.

The spelling of 30890493 in words is "thirty million, eight hundred ninety thousand, four hundred ninety-three".