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428140 = 22521407
BaseRepresentation
bin1101000100001101100
3210202022001
41220201230
5102200030
613102044
73432136
oct1504154
9722261
10428140
11272739
12187924
1311cb4b
14b2056
1586cca
hex6886c

428140 has 12 divisors (see below), whose sum is σ = 899136. Its totient is φ = 171248.

The previous prime is 428137. The next prime is 428143. The reversal of 428140 is 41824.

It is an interprime number because it is at equal distance from previous prime (428137) and next prime (428143).

It is not an unprimeable number, because it can be changed into a prime (428143) 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, 10684 + ... + 10723.

It is an arithmetic number, because the mean of its divisors is an integer number (74928).

2428140 is an apocalyptic number.

It is an amenable number.

428140 is an abundant number, since it is smaller than the sum of its proper divisors (470996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428140 is a wasteful number, since it uses less digits than its factorization.

428140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21416 (or 21414 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 428140 is about 654.3240787255. The cubic root of 428140 is about 75.3694364937.

Adding to 428140 its reverse (41824), we get a palindrome (469964).

The spelling of 428140 in words is "four hundred twenty-eight thousand, one hundred forty".

Divisors: 1 2 4 5 10 20 21407 42814 85628 107035 214070 428140