Search a number
-
+
1998849 = 33121493
BaseRepresentation
bin111101000000000000001
310202112220110
413220000001
51002430344
6110501533
722663356
oct7500001
93675813
101998849
111145846
128048a9
1354ca68
143a062d
152973b9
hex1e8001

1998849 has 8 divisors (see below), whose sum is σ = 2751232. Its totient is φ = 1289520.

The previous prime is 1998839. The next prime is 1998881. The reversal of 1998849 is 9488991.

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

It is not a de Polignac number, because 1998849 - 25 = 1998817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1998798 and 1998807.

It is not an unprimeable number, because it can be changed into a prime (1998839) 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, 10654 + ... + 10839.

It is an arithmetic number, because the mean of its divisors is an integer number (343904).

It is a Proth number, since it is equal to 61 ⋅ 215 + 1 and 61 < 215.

21998849 is an apocalyptic number.

It is an amenable number.

1998849 is a deficient number, since it is larger than the sum of its proper divisors (752383).

1998849 is a wasteful number, since it uses less digits than its factorization.

1998849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21527.

The product of its digits is 186624, while the sum is 48.

The square root of 1998849 is about 1413.8065638552. The cubic root of 1998849 is about 125.9679308660.

The spelling of 1998849 in words is "one million, nine hundred ninety-eight thousand, eight hundred forty-nine".

Divisors: 1 3 31 93 21493 64479 666283 1998849