30081072 has 40 divisors (see below), whose sum is σ = 88811776. Its totient is φ = 8594496.

The previous prime is 30081071. The next prime is 30081089. The reversal of 30081072 is 27018003.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (30081071) 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, 44428 + ... + 45099.

Almost surely, 2^30081072 is an apocalyptic number.

It is an amenable number.

30081072 is an abundant number, since it is smaller than the sum of its proper divisors (58730704).

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

30081072 is a wasteful number, since it uses less digits than its factorization.

30081072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89545 (or 89539 counting only the distinct ones).

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

The square root of 30081072 is about 5484.6214089944. The cubic root of 30081072 is about 311.0028983439.

Adding to 30081072 its reverse (27018003), we get a palindrome (57099075).

The spelling of 30081072 in words is "thirty million, eighty-one thousand, seventy-two".