30725305 has 8 divisors (see below), whose sum is σ = 39706632. Its totient is φ = 22689408.

The previous prime is 30725291. The next prime is 30725333. The reversal of 30725305 is 50352703.

It can be written as a sum of positive squares in 4 ways, for example, as 1597696 + 29127609 = 1264^2 + 5397^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30725305 - 2¹⁵ = 30692537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30725305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236284 + ... + 236413.

It is an arithmetic number, because the mean of its divisors is an integer number (4963329).

Almost surely, 2^30725305 is an apocalyptic number.

It is an amenable number.

30725305 is a deficient number, since it is larger than the sum of its proper divisors (8981327).

30725305 is a wasteful number, since it uses less digits than its factorization.

30725305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472715.

The product of its (nonzero) digits is 3150, while the sum is 25.

The square root of 30725305 is about 5543.0411328079. The cubic root of 30725305 is about 313.2074383573.

The spelling of 30725305 in words is "thirty million, seven hundred twenty-five thousand, three hundred five".