30000075 has 24 divisors (see below), whose sum is σ = 56686848. Its totient is φ = 13714080.

The previous prime is 30000071. The next prime is 30000079. The reversal of 30000075 is 57000003.

It is an interprime number because it is at equal distance from previous prime (30000071) and next prime (30000079).

It is not a de Polignac number, because 30000075 - 2² = 30000071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (30000071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28047 + ... + 29096.

It is an arithmetic number, because the mean of its divisors is an integer number (2361952).

Almost surely, 2^30000075 is an apocalyptic number.

30000075 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

30000075 is a deficient number, since it is larger than the sum of its proper divisors (26686773).

30000075 is a wasteful number, since it uses less digits than its factorization.

30000075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57163 (or 57158 counting only the distinct ones).

The product of its (nonzero) digits is 105, while the sum is 15.

The square root of 30000075 is about 5477.2324215794. The cubic root of 30000075 is about 310.7235095312.

Adding to 30000075 its reverse (57000003), we get a palindrome (87000078).

The spelling of 30000075 in words is "thirty million, seventy-five", and thus it is an aban number and an uban number.