30057440 has 96 divisors (see below), whose sum is σ = 83026944. Its totient is φ = 10068480.

The previous prime is 30057439. The next prime is 30057451. The reversal of 30057440 is 4475003.

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, 52355 + ... + 52925.

It is an arithmetic number, because the mean of its divisors is an integer number (864864).

Almost surely, 2^30057440 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 30057440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41513472).

30057440 is an abundant number, since it is smaller than the sum of its proper divisors (52969504).

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

30057440 is a wasteful number, since it uses less digits than its factorization.

30057440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 30057440 is about 5482.4665981655. The cubic root of 30057440 is about 310.9214346472.

The spelling of 30057440 in words is "thirty million, fifty-seven thousand, four hundred forty".