30129393 has 16 divisors (see below), whose sum is σ = 45997056. Its totient is φ = 17184720.

The previous prime is 30129391. The next prime is 30129401. The reversal of 30129393 is 39392103.

It is not a de Polignac number, because 30129393 - 2¹ = 30129391 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30129393.

It is not an unprimeable number, because it can be changed into a prime (30129391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14638 + ... + 16568.

It is an arithmetic number, because the mean of its divisors is an integer number (2874816).

Almost surely, 2^30129393 is an apocalyptic number.

It is an amenable number.

30129393 is a deficient number, since it is larger than the sum of its proper divisors (15867663).

30129393 is a wasteful number, since it uses less digits than its factorization.

30129393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 30129393 is about 5489.0247767705. The cubic root of 30129393 is about 311.1693366882.

The spelling of 30129393 in words is "thirty million, one hundred twenty-nine thousand, three hundred ninety-three".