30908421 has 12 divisors (see below), whose sum is σ = 46995520. Its totient is φ = 19521000.

The previous prime is 30908413. The next prime is 30908447. The reversal of 30908421 is 12480903.

It is not a de Polignac number, because 30908421 - 2³ = 30908413 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 (30908401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90205 + ... + 90546.

Almost surely, 2^30908421 is an apocalyptic number.

It is an amenable number.

30908421 is a deficient number, since it is larger than the sum of its proper divisors (16087099).

30908421 is a wasteful number, since it uses less digits than its factorization.

30908421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180776 (or 180773 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 30908421 is about 5559.5342430819. The cubic root of 30908421 is about 313.8284219559.

It can be divided in two parts, 30908 and 421, that added together give a square (31329 = 177²).

The spelling of 30908421 in words is "thirty million, nine hundred eight thousand, four hundred twenty-one".