30028023 has 16 divisors (see below), whose sum is σ = 44765440. Its totient is φ = 19892952.

The previous prime is 30028003. The next prime is 30028027. The reversal of 30028023 is 32082003.

It is not a de Polignac number, because 30028023 - 2⁹ = 30027511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30027987 and 30028005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30028027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 990 + ... + 7812.

It is an arithmetic number, because the mean of its divisors is an integer number (2797840).

Almost surely, 2^30028023 is an apocalyptic number.

30028023 is a deficient number, since it is larger than the sum of its proper divisors (14737417).

30028023 is a wasteful number, since it uses less digits than its factorization.

30028023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6995 (or 6989 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 30028023 is about 5479.7831161461. The cubic root of 30028023 is about 310.8199693494.

It can be divided in two parts, 3002 and 8023, that added together give a square (11025 = 105²).

The spelling of 30028023 in words is "thirty million, twenty-eight thousand, twenty-three".