30715000 has 40 divisors (see below), whose sum is σ = 71976960. Its totient is φ = 12284000.

The previous prime is 30714997. The next prime is 30715007. The reversal of 30715000 is 51703.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×30715000² = 1886822450000000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30715007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1929 + ... + 8071.

It is an arithmetic number, because the mean of its divisors is an integer number (1799424).

Almost surely, 2^30715000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30715000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35988480).

30715000 is an abundant number, since it is smaller than the sum of its proper divisors (41261960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30715000 is an equidigital number, since it uses as much as digits as its factorization.

30715000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6169 (or 6150 counting only the distinct ones).

The product of its (nonzero) digits is 105, while the sum is 16.

The square root of 30715000 is about 5542.1115109676. Note that the first 3 decimals coincide. The cubic root of 30715000 is about 313.1724187585.

Adding to 30715000 its reverse (51703), we get a palindrome (30766703).

The spelling of 30715000 in words is "thirty million, seven hundred fifteen thousand".