Search a number
-
+
3981605 = 54716943
BaseRepresentation
bin1111001100000100100101
321111021201212
433030010211
52004402410
6221201205
745562115
oct17140445
97437655
103981605
11227a491
121400205
13a953a4
14759045
15539b05
hex3cc125

3981605 has 8 divisors (see below), whose sum is σ = 4879872. Its totient is φ = 3117328.

The previous prime is 3981589. The next prime is 3981617. The reversal of 3981605 is 5061893.

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 3981605 - 24 = 3981589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8237 + ... + 8706.

It is an arithmetic number, because the mean of its divisors is an integer number (609984).

Almost surely, 23981605 is an apocalyptic number.

It is an amenable number.

3981605 is a deficient number, since it is larger than the sum of its proper divisors (898267).

3981605 is a wasteful number, since it uses less digits than its factorization.

3981605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16995.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 3981605 is about 1995.3959506825. The cubic root of 3981605 is about 158.4963958751.

The spelling of 3981605 in words is "three million, nine hundred eighty-one thousand, six hundred five".

Divisors: 1 5 47 235 16943 84715 796321 3981605