30129446 has 4 divisors (see below), whose sum is σ = 45194172. Its totient is φ = 15064722.

The previous prime is 30129443. The next prime is 30129467. The reversal of 30129446 is 64492103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64492103 = 13 ⋅4960931.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30129443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7532360 + ... + 7532363.

It is an arithmetic number, because the mean of its divisors is an integer number (11298543).

Almost surely, 2^30129446 is an apocalyptic number.

30129446 is a deficient number, since it is larger than the sum of its proper divisors (15064726).

30129446 is a wasteful number, since it uses less digits than its factorization.

30129446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15064725.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 30129446 is about 5489.0296045840. The cubic root of 30129446 is about 311.1695191453.

The spelling of 30129446 in words is "thirty million, one hundred twenty-nine thousand, four hundred forty-six".