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7680481 = 17451793
BaseRepresentation
bin11101010011000111100001
3112110012122021
4131103013201
53431233411
6432341441
7122166034
oct35230741
915405567
107680481
114376506
1226a4881
13178bb83
14103d01b
15a1aa71
hex7531e1

7680481 has 4 divisors (see below), whose sum is σ = 8132292. Its totient is φ = 7228672.

The previous prime is 7680479. The next prime is 7680493. The reversal of 7680481 is 1840867.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1840867 = 7262981.

It can be written as a sum of positive squares in 2 ways, for example, as 3744225 + 3936256 = 1935^2 + 1984^2 .

It is not a de Polignac number, because 7680481 - 21 = 7680479 is a prime.

It is a super-2 number, since 2×76804812 = 117979576782722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7680181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225880 + ... + 225913.

It is an arithmetic number, because the mean of its divisors is an integer number (2033073).

Almost surely, 27680481 is an apocalyptic number.

It is an amenable number.

7680481 is a deficient number, since it is larger than the sum of its proper divisors (451811).

7680481 is a wasteful number, since it uses less digits than its factorization.

7680481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451810.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 7680481 is about 2771.3680737138. The cubic root of 7680481 is about 197.3010847771.

The spelling of 7680481 in words is "seven million, six hundred eighty thousand, four hundred eighty-one".

Divisors: 1 17 451793 7680481