30471320 has 64 divisors (see below), whose sum is σ = 78071040. Its totient is φ = 10595200.

The previous prime is 30471319. The next prime is 30471341. The reversal of 30471320 is 2317403.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 30471292 and 30471301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8615 + ... + 11625.

It is an arithmetic number, because the mean of its divisors is an integer number (1219860).

Almost surely, 2^30471320 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 30471320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39035520).

30471320 is an abundant number, since it is smaller than the sum of its proper divisors (47599720).

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

30471320 is a wasteful number, since it uses less digits than its factorization.

30471320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056 (or 3052 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 30471320 is about 5520.0833327043. The cubic root of 30471320 is about 312.3420257547.

Adding to 30471320 its reverse (2317403), we get a palindrome (32788723).

The spelling of 30471320 in words is "thirty million, four hundred seventy-one thousand, three hundred twenty".