30728630 has 32 divisors (see below), whose sum is σ = 56730240. Its totient is φ = 11980800.

The previous prime is 30728629. The next prime is 30728641. The reversal of 30728630 is 3682703.

It is a junction number, because it is equal to n+sod(n) for n = 30728593 and 30728602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76430 + ... + 76830.

It is an arithmetic number, because the mean of its divisors is an integer number (1772820).

Almost surely, 2^30728630 is an apocalyptic number.

30728630 is a deficient number, since it is larger than the sum of its proper divisors (26001610).

30728630 is a wasteful number, since it uses less digits than its factorization.

30728630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 30728630 is about 5543.3410503053. The cubic root of 30728630 is about 313.2187360717.

The spelling of 30728630 in words is "thirty million, seven hundred twenty-eight thousand, six hundred thirty".