30557680 has 40 divisors (see below), whose sum is σ = 72397152. Its totient is φ = 11990784.

The previous prime is 30557663. The next prime is 30557701. The reversal of 30557680 is 8675503.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 637 + ... + 7843.

Almost surely, 2^30557680 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 30557680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36198576).

30557680 is an abundant number, since it is smaller than the sum of its proper divisors (41839472).

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

30557680 is a wasteful number, since it uses less digits than its factorization.

30557680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7273 (or 7267 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 30557680 is about 5527.9001438159. The cubic root of 30557680 is about 312.6368211538.

The spelling of 30557680 in words is "thirty million, five hundred fifty-seven thousand, six hundred eighty".