30028071 has 8 divisors (see below), whose sum is σ = 40330224. Its totient is φ = 19872320.

The previous prime is 30028027. The next prime is 30028091. The reversal of 30028071 is 17082003.

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 30028071 - 2¹⁹ = 29503783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30028091) 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, 36120 + ... + 36941.

It is an arithmetic number, because the mean of its divisors is an integer number (5041278).

Almost surely, 2^30028071 is an apocalyptic number.

30028071 is a deficient number, since it is larger than the sum of its proper divisors (10302153).

30028071 is a wasteful number, since it uses less digits than its factorization.

30028071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73201.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 30028071 is about 5479.7874958797. The cubic root of 30028071 is about 310.8201349653.

The spelling of 30028071 in words is "thirty million, twenty-eight thousand, seventy-one".