Search a number
-
+
7920485 = 510914533
BaseRepresentation
bin11110001101101101100101
3112220101212022
4132031231211
54011423420
6441432525
7124215536
oct36155545
915811768
107920485
11451a861
12279b745
1318441a1
1410a268d
15a66c25
hex78db65

7920485 has 8 divisors (see below), whose sum is σ = 9592440. Its totient is φ = 6277824.

The previous prime is 7920481. The next prime is 7920529. The reversal of 7920485 is 5840297.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1560001 + 6360484 = 1249^2 + 2522^2 .

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 7920485 - 22 = 7920481 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7920481) 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, 6722 + ... + 7811.

It is an arithmetic number, because the mean of its divisors is an integer number (1199055).

Almost surely, 27920485 is an apocalyptic number.

It is an amenable number.

7920485 is a deficient number, since it is larger than the sum of its proper divisors (1671955).

7920485 is a wasteful number, since it uses less digits than its factorization.

7920485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14647.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 7920485 is about 2814.3356231978. The cubic root of 7920485 is about 199.3351674371.

The spelling of 7920485 in words is "seven million, nine hundred twenty thousand, four hundred eighty-five".

Divisors: 1 5 109 545 14533 72665 1584097 7920485