30424640 has 56 divisors (see below), whose sum is σ = 74810112. Its totient is φ = 11773440.

The previous prime is 30424637. The next prime is 30424649. The reversal of 30424640 is 4642403.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (30424649) 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, 8387 + ... + 11453.

Almost surely, 2^30424640 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 30424640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37405056).

30424640 is an abundant number, since it is smaller than the sum of its proper divisors (44385472).

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

30424640 is a wasteful number, since it uses less digits than its factorization.

30424640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3115 (or 3105 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 30424640 is about 5515.8535150963. The cubic root of 30424640 is about 312.1824486249.

The spelling of 30424640 in words is "thirty million, four hundred twenty-four thousand, six hundred forty".