30486281 has 12 divisors (see below), whose sum is σ = 35559108. Its totient is φ = 26060832.

The previous prime is 30486277. The next prime is 30486283. The reversal of 30486281 is 18268403.

It can be written as a sum of positive squares in 2 ways, for example, as 1960000 + 28526281 = 1400^2 + 5341^2 .

It is not a de Polignac number, because 30486281 - 2² = 30486277 is a prime.

It is a super-2 number, since 2×30486281² = 1858826658421922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30486283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26735 + ... + 27851.

It is an arithmetic number, because the mean of its divisors is an integer number (2963259).

Almost surely, 2^30486281 is an apocalyptic number.

It is an amenable number.

30486281 is a deficient number, since it is larger than the sum of its proper divisors (5072827).

30486281 is a wasteful number, since it uses less digits than its factorization.

30486281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688 (or 1681 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 30486281 is about 5521.4383089916. The cubic root of 30486281 is about 312.3931359404.

The spelling of 30486281 in words is "thirty million, four hundred eighty-six thousand, two hundred eighty-one".