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428999 = 4211019
BaseRepresentation
bin1101000101111000111
3210210110212
41220233013
5102211444
613110035
73434504
oct1505707
9723425
10428999
1127334a
1218831b
1312035c
14b24ab
158719e
hex68bc7

428999 has 4 divisors (see below), whose sum is σ = 430440. Its totient is φ = 427560.

The previous prime is 428977. The next prime is 429007. The reversal of 428999 is 999824.

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 428999 - 212 = 424903 is a prime.

It is a Duffinian number.

428999 is a modest number, since divided by 999 gives 428 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89 + ... + 930.

It is an arithmetic number, because the mean of its divisors is an integer number (107610).

2428999 is an apocalyptic number.

428999 is a deficient number, since it is larger than the sum of its proper divisors (1441).

428999 is a wasteful number, since it uses less digits than its factorization.

428999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440.

The product of its digits is 46656, while the sum is 41.

The square root of 428999 is about 654.9801523710. The cubic root of 428999 is about 75.4198087204.

The spelling of 428999 in words is "four hundred twenty-eight thousand, nine hundred ninety-nine".

Divisors: 1 421 1019 428999