Search a number
-
+
2981030 = 251323997
BaseRepresentation
bin1011010111110010100110
312121110012112
423113302212
51230343110
6143521022
734224023
oct13276246
95543175
102981030
111756768
12bb9172
13804b30
1457854a
153dd405
hex2d7ca6

2981030 has 32 divisors (see below), whose sum is σ = 6035904. Its totient is φ = 1051776.

The previous prime is 2981029. The next prime is 2981039. The reversal of 2981030 is 301892.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2980987 and 2981005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2981039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2492 + ... + 3488.

It is an arithmetic number, because the mean of its divisors is an integer number (188622).

22981030 is an apocalyptic number.

2981030 is an abundant number, since it is smaller than the sum of its proper divisors (3054874).

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

2981030 is a wasteful number, since it uses less digits than its factorization.

2981030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2981030 is about 1726.5659558789. The cubic root of 2981030 is about 143.9203198587.

The spelling of 2981030 in words is "two million, nine hundred eighty-one thousand, thirty".

Divisors: 1 2 5 10 13 23 26 46 65 115 130 230 299 598 997 1495 1994 2990 4985 9970 12961 22931 25922 45862 64805 114655 129610 229310 298103 596206 1490515 2981030