30288730 has 16 divisors (see below), whose sum is σ = 57727080. Its totient is φ = 11402752.

The previous prime is 30288691. The next prime is 30288737. The reversal of 30288730 is 3788203.

It can be written as a sum of positive squares in 4 ways, for example, as 24571849 + 5716881 = 4957^2 + 2391^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30288692 and 30288701.

It is not an unprimeable number, because it can be changed into a prime (30288737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88915 + ... + 89254.

Almost surely, 2^30288730 is an apocalyptic number.

30288730 is a deficient number, since it is larger than the sum of its proper divisors (27438350).

30288730 is a wasteful number, since it uses less digits than its factorization.

30288730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178193.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 30288730 is about 5503.5197828299. The cubic root of 30288730 is about 311.7169043416.

The spelling of 30288730 in words is "thirty million, two hundred eighty-eight thousand, seven hundred thirty".