30129869 has 32 divisors (see below), whose sum is σ = 39536640. Its totient is φ = 22276800.

The previous prime is 30129857. The next prime is 30129881. The reversal of 30129869 is 96892103.

It is an interprime number because it is at equal distance from previous prime (30129857) and next prime (30129881).

It is a de Polignac number, because none of the positive numbers 2^k-30129869 is a prime.

It is a super-2 number, since 2×30129869² = 1815618011914322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30129829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229934 + ... + 230064.

It is an arithmetic number, because the mean of its divisors is an integer number (1235520).

Almost surely, 2^30129869 is an apocalyptic number.

It is an amenable number.

30129869 is a deficient number, since it is larger than the sum of its proper divisors (9406771).

30129869 is a wasteful number, since it uses less digits than its factorization.

30129869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 30129869 is about 5489.0681358497. The cubic root of 30129869 is about 311.1709753518.

The spelling of 30129869 in words is "thirty million, one hundred twenty-nine thousand, eight hundred sixty-nine".