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1080981440 = 265711192309
BaseRepresentation
bin100000001101110…
…0111011111000000
32210100001112202122
41000123213133000
54203212401230
6255133103412
735534122250
oct10033473700
92710045678
101080981440
115052053a0
12262027b68
13142c521b6
14a37cb960
1564d7abe5
hex406e77c0

1080981440 has 224 divisors, whose sum is σ = 3379622400. Its totient is φ = 319057920.

The previous prime is 1080981437. The next prime is 1080981457. The reversal of 1080981440 is 441890801.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1080981440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 467006 + ... + 469314.

It is an arithmetic number, because the mean of its divisors is an integer number (15087600).

Almost surely, 21080981440 is an apocalyptic number.

1080981440 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 1080981440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1689811200).

1080981440 is an abundant number, since it is smaller than the sum of its proper divisors (2298640960).

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

1080981440 is a wasteful number, since it uses less digits than its factorization.

1080981440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363 (or 2353 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 1080981440 is about 32878.2821935697. The cubic root of 1080981440 is about 1026.2962588742.

The spelling of 1080981440 in words is "one billion, eighty million, nine hundred eighty-one thousand, four hundred forty".