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2217080 = 235431289
BaseRepresentation
bin1000011101010001111000
311011122021002
420131101320
51031421310
6115304132
724562535
oct10352170
94148232
102217080
1112847a8
128ab048
135c81a8
14419d8c
152dbda5
hex21d478

2217080 has 32 divisors (see below), whose sum is σ = 5108400. Its totient is φ = 865536.

The previous prime is 2217073. The next prime is 2217101. The reversal of 2217080 is 807122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1076 + ... + 2364.

22217080 is an apocalyptic number.

2217080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

2217080 is the 860-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2217080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2554200).

2217080 is an abundant number, since it is smaller than the sum of its proper divisors (2891320).

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

2217080 is a wasteful number, since it uses less digits than its factorization.

2217080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343 (or 1339 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 2217080 is about 1488.9862323071. The cubic root of 2217080 is about 130.3948547031.

The spelling of 2217080 in words is "two million, two hundred seventeen thousand, eighty".

Divisors: 1 2 4 5 8 10 20 40 43 86 172 215 344 430 860 1289 1720 2578 5156 6445 10312 12890 25780 51560 55427 110854 221708 277135 443416 554270 1108540 2217080