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BaseRepresentation
bin1000011000100101000110
311010122212010
420120211012
51030312310
6115035050
724452445
oct10304506
94118763
102197830
111271298
1289ba86
135bc4bb
14412d5c
152d6320
hex218946

2197830 has 32 divisors (see below), whose sum is σ = 5365728. Its totient is φ = 576000.

The previous prime is 2197799. The next prime is 2197847. The reversal of 2197830 is 387912.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 1230 + ... + 2430.

It is an arithmetic number, because the mean of its divisors is an integer number (167679).

22197830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2197830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2682864).

2197830 is an abundant number, since it is smaller than the sum of its proper divisors (3167898).

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

2197830 is a wasteful number, since it uses less digits than its factorization.

2197830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 2197830 is about 1482.5080100964. The cubic root of 2197830 is about 130.0163687475.

The spelling of 2197830 in words is "two million, one hundred ninety-seven thousand, eight hundred thirty".