30863881 has 4 divisors (see below), whose sum is σ = 31025664. Its totient is φ = 30702100.

The previous prime is 30863867. The next prime is 30863897. The reversal of 30863881 is 18836803.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30863881 - 2¹⁷ = 30732809 is a prime.

It is a super-2 number, since 2×30863881² = 1905158300764322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30863881.

It is not an unprimeable number, because it can be changed into a prime (30863821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80605 + ... + 80986.

It is an arithmetic number, because the mean of its divisors is an integer number (7756416).

Almost surely, 2^30863881 is an apocalyptic number.

It is an amenable number.

30863881 is a deficient number, since it is larger than the sum of its proper divisors (161783).

30863881 is a wasteful number, since it uses less digits than its factorization.

30863881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161782.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 30863881 is about 5555.5270677047. The cubic root of 30863881 is about 313.6776039690.

The spelling of 30863881 in words is "thirty million, eight hundred sixty-three thousand, eight hundred eighty-one".