30726320 has 20 divisors (see below), whose sum is σ = 71438880. Its totient is φ = 12290496.

The previous prime is 30726281. The next prime is 30726329. The reversal of 30726320 is 2362703.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30726329) 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, 191960 + ... + 192119.

It is an arithmetic number, because the mean of its divisors is an integer number (3571944).

Almost surely, 2^30726320 is an apocalyptic number.

It is an amenable number.

30726320 is an abundant number, since it is smaller than the sum of its proper divisors (40712560).

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

30726320 is a wasteful number, since it uses less digits than its factorization.

30726320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384092 (or 384086 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 30726320 is about 5543.1326882910. The cubic root of 30726320 is about 313.2108872197.

The spelling of 30726320 in words is "thirty million, seven hundred twenty-six thousand, three hundred twenty".