30389472 has 96 divisors (see below), whose sum is σ = 93895200. Its totient is φ = 9529344.

The previous prime is 30389459. The next prime is 30389473. The reversal of 30389472 is 27498303.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30389473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13654 + ... + 15722.

It is an arithmetic number, because the mean of its divisors is an integer number (978075).

Almost surely, 2^30389472 is an apocalyptic number.

30389472 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 30389472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46947600).

30389472 is an abundant number, since it is smaller than the sum of its proper divisors (63505728).

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

30389472 is a wasteful number, since it uses less digits than its factorization.

30389472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105 (or 2091 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 30389472 is about 5512.6646914174. The cubic root of 30389472 is about 312.0621178093.

The spelling of 30389472 in words is "thirty million, three hundred eighty-nine thousand, four hundred seventy-two".