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2981340 = 223355521
BaseRepresentation
bin1011010111110111011100
312121110122000
423113313130
51230400330
6143522300
734224645
oct13276734
95543560
102981340
111756a1a
12bb9390
1380500b
145786cc
153dd560
hex2d7ddc

2981340 has 48 divisors (see below), whose sum is σ = 9276960. Its totient is φ = 794880.

The previous prime is 2981339. The next prime is 2981357. The reversal of 2981340 is 431892.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 2221 + ... + 3300.

It is an arithmetic number, because the mean of its divisors is an integer number (193270).

22981340 is an apocalyptic number.

2981340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2981340 is an abundant number, since it is smaller than the sum of its proper divisors (6295620).

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

2981340 is a wasteful number, since it uses less digits than its factorization.

2981340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5539 (or 5531 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2981340 is about 1726.6557271211. The cubic root of 2981340 is about 143.9253084871.

It can be divided in two parts, 2981 and 340, that added together give a triangular number (3321 = T81).

The spelling of 2981340 in words is "two million, nine hundred eighty-one thousand, three hundred forty".

Divisors: 1 2 3 4 5 6 9 10 12 15 18 20 27 30 36 45 54 60 90 108 135 180 270 540 5521 11042 16563 22084 27605 33126 49689 55210 66252 82815 99378 110420 149067 165630 198756 248445 298134 331260 496890 596268 745335 993780 1490670 2981340