30139811 has 8 divisors (see below), whose sum is σ = 32541264. Its totient is φ = 27750240.

The previous prime is 30139801. The next prime is 30139817. The reversal of 30139811 is 11893103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30139811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30139817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2720 + ... + 8226.

It is an arithmetic number, because the mean of its divisors is an integer number (4067658).

Almost surely, 2^30139811 is an apocalyptic number.

30139811 is a deficient number, since it is larger than the sum of its proper divisors (2401453).

30139811 is a wasteful number, since it uses less digits than its factorization.

30139811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5941.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 30139811 is about 5489.9736793540. The cubic root of 30139811 is about 311.2051974458.

The spelling of 30139811 in words is "thirty million, one hundred thirty-nine thousand, eight hundred eleven".