30724480 has 64 divisors (see below), whose sum is σ = 74749680. Its totient is φ = 12072960.

The previous prime is 30724433. The next prime is 30724483. The reversal of 30724480 is 8442703.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30724483) 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, 38647 + ... + 39433.

Almost surely, 2^30724480 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 30724480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37374840).

30724480 is an abundant number, since it is smaller than the sum of its proper divisors (44025200).

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

30724480 is an equidigital number, since it uses as much as digits as its factorization.

30724480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867 (or 855 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 30724480 is about 5542.9667146755. The cubic root of 30724480 is about 313.2046350388.

The spelling of 30724480 in words is "thirty million, seven hundred twenty-four thousand, four hundred eighty".