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3688813 = 17972237
BaseRepresentation
bin1110000100100101101101
320221102002201
432010211231
51421020223
6211021501
743232362
oct16044555
96842081
103688813
11209a507
12129a891
139c203b
146c0469
154ccead
hex38496d

3688813 has 8 divisors (see below), whose sum is σ = 3947832. Its totient is φ = 3434496.

The previous prime is 3688801. The next prime is 3688837. The reversal of 3688813 is 3188863.

3688813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1432809 + 2256004 = 1197^2 + 1502^2 .

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 3688813 - 25 = 3688781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3688313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531 + ... + 2767.

It is an arithmetic number, because the mean of its divisors is an integer number (493479).

Almost surely, 23688813 is an apocalyptic number.

It is an amenable number.

3688813 is a deficient number, since it is larger than the sum of its proper divisors (259019).

3688813 is a wasteful number, since it uses less digits than its factorization.

3688813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2351.

The product of its digits is 27648, while the sum is 37.

The square root of 3688813 is about 1920.6282826200. The cubic root of 3688813 is about 154.5119997103.

The spelling of 3688813 in words is "three million, six hundred eighty-eight thousand, eight hundred thirteen".

Divisors: 1 17 97 1649 2237 38029 216989 3688813