30430720 has 40 divisors (see below), whose sum is σ = 72968544. Its totient is φ = 12171264.

The previous prime is 30430681. The next prime is 30430727. The reversal of 30430720 is 2703403.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30430727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3384 + ... + 8503.

Almost surely, 2^30430720 is an apocalyptic number.

It is an amenable number.

30430720 is an abundant number, since it is smaller than the sum of its proper divisors (42537824).

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

30430720 is an equidigital number, since it uses as much as digits as its factorization.

30430720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11910 (or 11894 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 30430720 is about 5516.4046262036. The cubic root of 30430720 is about 312.2032425479.

The spelling of 30430720 in words is "thirty million, four hundred thirty thousand, seven hundred twenty".