Search a number
-
+
7428287 = 23322969
BaseRepresentation
bin11100010101100010111111
3111222101200202
4130111202333
53400201122
6423114115
7120065546
oct34254277
914871622
107428287
114213a89
1225a293b
131701149
14db515d
159bae92
hex7158bf

7428287 has 4 divisors (see below), whose sum is σ = 7751280. Its totient is φ = 7105296.

The previous prime is 7428283. The next prime is 7428301. The reversal of 7428287 is 7828247.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7428287 - 22 = 7428283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7428287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7428283) 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, 161462 + ... + 161507.

It is an arithmetic number, because the mean of its divisors is an integer number (1937820).

Almost surely, 27428287 is an apocalyptic number.

7428287 is a deficient number, since it is larger than the sum of its proper divisors (322993).

7428287 is a wasteful number, since it uses less digits than its factorization.

7428287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322992.

The product of its digits is 50176, while the sum is 38.

The square root of 7428287 is about 2725.4883965998. The cubic root of 7428287 is about 195.1175009563.

The spelling of 7428287 in words is "seven million, four hundred twenty-eight thousand, two hundred eighty-seven".

Divisors: 1 23 322969 7428287