30890 has 8 divisors (see below), whose sum is σ = 55620. Its totient is φ = 12352.

The previous prime is 30881. The next prime is 30893. The reversal of 30890 is 9803.

30890 is an esthetic number in base 11, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 29929 + 961 = 173^2 + 31^2 .

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

It is a fibodiv number, since the Fibonacci-like sequence with seeds 30 and 890 contains 30890 itself.

It is a Curzon number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (30893) 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, 1535 + ... + 1554.

2³⁰⁸⁹⁰ is an apocalyptic number.

30890 is a deficient number, since it is larger than the sum of its proper divisors (24730).

30890 is a wasteful number, since it uses less digits than its factorization.

30890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3096.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 30890 is about 175.7555120046. The cubic root of 30890 is about 31.3766063737.

The spelling of 30890 in words is "thirty thousand, eight hundred ninety".