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2083861 = 131571021
BaseRepresentation
bin111111100110000010101
310220212112001
413330300111
51013140421
6112355301
723466253
oct7746025
93825461
102083861
1111a36aa
12845b31
1357c670
143c35d3
152b2691
hex1fcc15

2083861 has 8 divisors (see below), whose sum is σ = 2260664. Its totient is φ = 1909440.

The previous prime is 2083859. The next prime is 2083867. The reversal of 2083861 is 1683802.

2083861 = T78 + T79 + ... + T234.

2083861 is a nontrivial binomial coefficient, being equal to C(2042, 2).

It can be written as a sum of positive squares in 4 ways, for example, as 36100 + 2047761 = 190^2 + 1431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2083861 - 21 = 2083859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2083867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1531 + ... + 2551.

It is an arithmetic number, because the mean of its divisors is an integer number (282583).

22083861 is an apocalyptic number.

2083861 is the 2041-st triangular number and also the 1021-st hexagonal number.

2083861 is the 681-st centered nonagonal number.

It is an amenable number.

2083861 is a deficient number, since it is larger than the sum of its proper divisors (176803).

2083861 is a wasteful number, since it uses less digits than its factorization.

2083861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2083861 is about 1443.5584504965. The cubic root of 2083861 is about 127.7290206472.

The spelling of 2083861 in words is "two million, eighty-three thousand, eight hundred sixty-one".

Divisors: 1 13 157 1021 2041 13273 160297 2083861