30557072 has 80 divisors (see below), whose sum is σ = 75328512. Its totient is φ = 11681280.

The previous prime is 30557071. The next prime is 30557077. The reversal of 30557072 is 27075503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30557071) 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, 44798 + ... + 45474.

Almost surely, 2^30557072 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 30557072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37664256).

30557072 is an abundant number, since it is smaller than the sum of its proper divisors (44771440).

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

30557072 is a wasteful number, since it uses less digits than its factorization.

30557072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 7350, while the sum is 29.

The square root of 30557072 is about 5527.8451497849. The cubic root of 30557072 is about 312.6347476495.

The spelling of 30557072 in words is "thirty million, five hundred fifty-seven thousand, seventy-two".