Search a number
-
+
30688545 = 352045903
BaseRepresentation
bin111010100010…
…0010100100001
32010202010202210
41311010110201
530324013140
63013432333
7521563656
oct165042441
963663683
1030688545
1116360838
12a33b6a9
136486504
14410bc2d
152a62d80
hex1d44521

30688545 has 8 divisors (see below), whose sum is σ = 49101696. Its totient is φ = 16367216.

The previous prime is 30688523. The next prime is 30688549. The reversal of 30688545 is 54588603.

It is a happy number.

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 30688545 - 28 = 30688289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30688549) 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, 1022937 + ... + 1022966.

It is an arithmetic number, because the mean of its divisors is an integer number (6137712).

Almost surely, 230688545 is an apocalyptic number.

It is an amenable number.

30688545 is a deficient number, since it is larger than the sum of its proper divisors (18413151).

30688545 is a wasteful number, since it uses less digits than its factorization.

30688545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045911.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 30688545 is about 5539.7242711167. The cubic root of 30688545 is about 313.0824805513.

The spelling of 30688545 in words is "thirty million, six hundred eighty-eight thousand, five hundred forty-five".

Divisors: 1 3 5 15 2045903 6137709 10229515 30688545