30628305 has 24 divisors (see below), whose sum is σ = 56213352. Its totient is φ = 15373824.

The previous prime is 30628303. The next prime is 30628319. The reversal of 30628305 is 50382603.

30628305 is a `hidden beast` number, since 3 + 0 + 628 + 30 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 10188864 + 20439441 = 3192^2 + 4521^2 .

It is not a de Polignac number, because 30628305 - 2¹ = 30628303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30628303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19254 + ... + 20783.

It is an arithmetic number, because the mean of its divisors is an integer number (2342223).

Almost surely, 2^30628305 is an apocalyptic number.

It is an amenable number.

30628305 is a deficient number, since it is larger than the sum of its proper divisors (25585047).

30628305 is a wasteful number, since it uses less digits than its factorization.

30628305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40065 (or 40062 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 30628305 is about 5534.2845066006. The cubic root of 30628305 is about 312.8774915501.

The spelling of 30628305 in words is "thirty million, six hundred twenty-eight thousand, three hundred five".