30905329 has 32 divisors (see below), whose sum is σ = 40320000. Its totient is φ = 23510592.

The previous prime is 30905327. The next prime is 30905351. The reversal of 30905329 is 92350903.

It is not a de Polignac number, because 30905329 - 2¹ = 30905327 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30905329.

It is not an unprimeable number, because it can be changed into a prime (30905327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129192 + ... + 129430.

It is an arithmetic number, because the mean of its divisors is an integer number (1260000).

Almost surely, 2^30905329 is an apocalyptic number.

It is an amenable number.

30905329 is a deficient number, since it is larger than the sum of its proper divisors (9414671).

30905329 is a wasteful number, since it uses less digits than its factorization.

30905329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 30905329 is about 5559.2561552783. The cubic root of 30905329 is about 313.8179567406.

The spelling of 30905329 in words is "thirty million, nine hundred five thousand, three hundred twenty-nine".