30000072 has 16 divisors (see below), whose sum is σ = 75000240. Its totient is φ = 10000016.

The previous prime is 30000071. The next prime is 30000079. The reversal of 30000072 is 27000003.

It is a Harshad number since it is a multiple of its sum of digits (12).

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 3 ways as a sum of consecutive naturals, for example, 624978 + ... + 625025.

It is an arithmetic number, because the mean of its divisors is an integer number (4687515).

Almost surely, 2^30000072 is an apocalyptic number.

It is an amenable number.

30000072 is an abundant number, since it is smaller than the sum of its proper divisors (45000168).

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

30000072 is a wasteful number, since it uses less digits than its factorization.

30000072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250012 (or 1250008 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 12.

The square root of 30000072 is about 5477.2321477184. The cubic root of 30000072 is about 310.7234991738.

Adding to 30000072 its reverse (27000003), we get a palindrome (57000075).

The spelling of 30000072 in words is "thirty million, seventy-two", and thus it is an aban number and an uban number.