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3728861 is a prime number
BaseRepresentation
bin1110001110010111011101
321000110000222
432032113131
51423310421
6211531125
743460213
oct16162735
97013028
103728861
112117604
1212b9aa5
13a07336
146d0cb3
154d9cab
hex38e5dd

3728861 has 2 divisors, whose sum is σ = 3728862. Its totient is φ = 3728860.

The previous prime is 3728821. The next prime is 3728863. The reversal of 3728861 is 1688273.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3728761 + 100 = 1931^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 3728861 - 210 = 3727837 is a prime.

Together with 3728863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3728863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1864430 + 1864431.

It is an arithmetic number, because the mean of its divisors is an integer number (1864431).

Almost surely, 23728861 is an apocalyptic number.

It is an amenable number.

3728861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3728861 is an equidigital number, since it uses as much as digits as its factorization.

3728861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 3728861 is about 1931.0258931459. The cubic root of 3728861 is about 155.0691470878.

The spelling of 3728861 in words is "three million, seven hundred twenty-eight thousand, eight hundred sixty-one".