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1080420 = 2235111637
BaseRepresentation
bin100000111110001100100
32000220001120
410013301210
5234033140
635053540
712116625
oct4076144
92026046
101080420
11678810
124412b0
132baa03
14201a4c
151651d0
hex107c64

1080420 has 48 divisors (see below), whose sum is σ = 3302208. Its totient is φ = 261760.

The previous prime is 1080419. The next prime is 1080433. The reversal of 1080420 is 240801.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1080420.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159 + ... + 1478.

It is an arithmetic number, because the mean of its divisors is an integer number (68796).

21080420 is an apocalyptic number.

1080420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1080420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1651104).

1080420 is an abundant number, since it is smaller than the sum of its proper divisors (2221788).

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

1080420 is a wasteful number, since it uses less digits than its factorization.

1080420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660 (or 1658 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1080420 is about 1039.4325374934. The cubic root of 1080420 is about 102.6118548898.

The spelling of 1080420 in words is "one million, eighty thousand, four hundred twenty".

Divisors: 1 2 3 4 5 6 10 11 12 15 20 22 30 33 44 55 60 66 110 132 165 220 330 660 1637 3274 4911 6548 8185 9822 16370 18007 19644 24555 32740 36014 49110 54021 72028 90035 98220 108042 180070 216084 270105 360140 540210 1080420