30321472 has 84 divisors (see below), whose sum is σ = 68099940. Its totient is φ = 13332480.

The previous prime is 30321461. The next prime is 30321481. The reversal of 30321472 is 27412303.

It can be written as a sum of positive squares in 2 ways, for example, as 19927296 + 10394176 = 4464^2 + 3224^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 978097 + ... + 978127.

Almost surely, 2^30321472 is an apocalyptic number.

30321472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30321472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34049970).

30321472 is an abundant number, since it is smaller than the sum of its proper divisors (37778468).

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

30321472 is a wasteful number, since it uses less digits than its factorization.

30321472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 30321472 is about 5506.4936211713. The cubic root of 30321472 is about 311.8291854822.

Adding to 30321472 its reverse (27412303), we get a palindrome (57733775).

The spelling of 30321472 in words is "thirty million, three hundred twenty-one thousand, four hundred seventy-two".