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1428207 = 311113383
BaseRepresentation
bin101011100101011101111
32200120010120
411130223233
5331200312
650340023
715065604
oct5345357
92616116
101428207
11896040
1258a613
133b00c1
142926ab
151d328c
hex15caef

1428207 has 16 divisors (see below), whose sum is σ = 2101248. Its totient is φ = 855680.

The previous prime is 1428199. The next prime is 1428209. The reversal of 1428207 is 7028241.

It is a cyclic number.

It is not a de Polignac number, because 1428207 - 23 = 1428199 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3538 + ... + 3920.

It is an arithmetic number, because the mean of its divisors is an integer number (131328).

21428207 is an apocalyptic number.

1428207 is a deficient number, since it is larger than the sum of its proper divisors (673041).

1428207 is a wasteful number, since it uses less digits than its factorization.

1428207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 1428207 is about 1195.0761482014. The cubic root of 1428207 is about 112.6152103687.

The spelling of 1428207 in words is "one million, four hundred twenty-eight thousand, two hundred seven".

Divisors: 1 3 11 33 113 339 383 1149 1243 3729 4213 12639 43279 129837 476069 1428207