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1081920 = 26357223
BaseRepresentation
bin100001000001001000000
32000222010010
410020021000
5234110140
635104520
712124200
oct4101100
92028103
101081920
11679954
12442140
132bb5b8
14202400
15165880
hex108240

1081920 has 168 divisors, whose sum is σ = 4169664. Its totient is φ = 236544.

The previous prime is 1081919. The next prime is 1081937. The reversal of 1081920 is 291801.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47029 + ... + 47051.

21081920 is an apocalyptic number.

1081920 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 1081920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2084832).

1081920 is an abundant number, since it is smaller than the sum of its proper divisors (3087744).

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

1081920 is a wasteful number, since it uses less digits than its factorization.

1081920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1081920 is about 1040.1538347764. The cubic root of 1081920 is about 102.6593199518.

The spelling of 1081920 in words is "one million, eighty-one thousand, nine hundred twenty".