30703530 has 128 divisors (see below), whose sum is σ = 91881216. Its totient is φ = 6451200.

The previous prime is 30703529. The next prime is 30703531. The reversal of 30703530 is 3530703.

It is an interprime number because it is at equal distance from previous prime (30703529) and next prime (30703531).

It is a junction number, because it is equal to n+sod(n) for n = 30703497 and 30703506.

It is not an unprimeable number, because it can be changed into a prime (30703531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 72720 + ... + 73140.

It is an arithmetic number, because the mean of its divisors is an integer number (717822).

Almost surely, 2^30703530 is an apocalyptic number.

30703530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30703530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45940608).

30703530 is an abundant number, since it is smaller than the sum of its proper divisors (61177686).

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

30703530 is a wasteful number, since it uses less digits than its factorization.

30703530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472.

The product of its (nonzero) digits is 945, while the sum is 21.

The square root of 30703530 is about 5541.0766101905. The cubic root of 30703530 is about 313.1334309147.

The spelling of 30703530 in words is "thirty million, seven hundred three thousand, five hundred thirty".