30128419 has 8 divisors (see below), whose sum is σ = 31545360. Its totient is φ = 28736736.

The previous prime is 30128411. The next prime is 30128429. The reversal of 30128419 is 91482103.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 30128419 - 2³ = 30128411 is a prime.

It is a super-2 number, since 2×30128419² = 1815443262879122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30128411) 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, 3852 + ... + 8665.

It is an arithmetic number, because the mean of its divisors is an integer number (3943170).

Almost surely, 2^30128419 is an apocalyptic number.

30128419 is a deficient number, since it is larger than the sum of its proper divisors (1416941).

30128419 is a wasteful number, since it uses less digits than its factorization.

30128419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12629.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 30128419 is about 5488.9360535535. The cubic root of 30128419 is about 311.1659835705.

The spelling of 30128419 in words is "thirty million, one hundred twenty-eight thousand, four hundred nineteen".