30900861 has 12 divisors (see below), whose sum is σ = 44815680. Its totient is φ = 20517000.

The previous prime is 30900853. The next prime is 30900871. The reversal of 30900861 is 16800903.

It is not a de Polignac number, because 30900861 - 2³ = 30900853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30900841) 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, 4581 + ... + 9098.

It is an arithmetic number, because the mean of its divisors is an integer number (3734640).

Almost surely, 2^30900861 is an apocalyptic number.

It is an amenable number.

30900861 is a deficient number, since it is larger than the sum of its proper divisors (13914819).

30900861 is a wasteful number, since it uses less digits than its factorization.

30900861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13936 (or 13933 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 30900861 is about 5558.8542884303. The cubic root of 30900861 is about 313.8028330683.

The spelling of 30900861 in words is "thirty million, nine hundred thousand, eight hundred sixty-one".