30660730 has 32 divisors (see below), whose sum is σ = 56652624. Its totient is φ = 11943936.

The previous prime is 30660727. The next prime is 30660739. The reversal of 30660730 is 3706603.

30660730 = 88² + 89² + ... + 452².

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 7070281 + 23590449 = 2659^2 + 4857^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30660695 and 30660704.

It is not an unprimeable number, because it can be changed into a prime (30660739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70594 + ... + 71026.

Almost surely, 2^30660730 is an apocalyptic number.

30660730 is a deficient number, since it is larger than the sum of its proper divisors (25991894).

30660730 is a wasteful number, since it uses less digits than its factorization.

30660730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610.

The product of its (nonzero) digits is 2268, while the sum is 25.

The square root of 30660730 is about 5537.2131979905. The cubic root of 30660730 is about 312.9878630372.

The spelling of 30660730 in words is "thirty million, six hundred sixty thousand, seven hundred thirty".