30786145 has 8 divisors (see below), whose sum is σ = 39785256. Its totient is φ = 22734336.

The previous prime is 30786143. The next prime is 30786157. The reversal of 30786145 is 54168703.

It can be written as a sum of positive squares in 4 ways, for example, as 6932689 + 23853456 = 2633^2 + 4884^2 .

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 30786145 - 2¹ = 30786143 is a prime.

It is a super-2 number, since 2×30786145² = 1895573447922050, which contains 22 as substring.

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 30786145.

It is not an unprimeable number, because it can be changed into a prime (30786143) 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, 236752 + ... + 236881.

It is an arithmetic number, because the mean of its divisors is an integer number (4973157).

Almost surely, 2^30786145 is an apocalyptic number.

It is an amenable number.

30786145 is a deficient number, since it is larger than the sum of its proper divisors (8999111).

30786145 is a wasteful number, since it uses less digits than its factorization.

30786145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473651.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 30786145 is about 5548.5263809412. The cubic root of 30786145 is about 313.4140322045.

The spelling of 30786145 in words is "thirty million, seven hundred eighty-six thousand, one hundred forty-five".