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2391489 = 32416481
BaseRepresentation
bin1001000111110111000001
311111111111200
421013313001
51103011424
6123131413
726220162
oct11076701
94444450
102391489
111393841
12973b69
136596a9
14463769
153238c9
hex247dc1

2391489 has 12 divisors (see below), whose sum is σ = 3539172. Its totient is φ = 1555200.

The previous prime is 2391469. The next prime is 2391491. The reversal of 2391489 is 9841932.

2391489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1192464 + 1199025 = 1092^2 + 1095^2 .

It is not a de Polignac number, because 2391489 - 212 = 2387393 is a prime.

2391489 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2391439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2872 + ... + 3609.

It is an arithmetic number, because the mean of its divisors is an integer number (294931).

22391489 is an apocalyptic number.

It is an amenable number.

2391489 is a deficient number, since it is larger than the sum of its proper divisors (1147683).

2391489 is a wasteful number, since it uses less digits than its factorization.

2391489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6528 (or 6525 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 2391489 is about 1546.4439854065. The cubic root of 2391489 is about 133.7281374578.

It can be divided in two parts, 239 and 1489, that added together give a cube (1728 = 123).

The spelling of 2391489 in words is "two million, three hundred ninety-one thousand, four hundred eighty-nine".

Divisors: 1 3 9 41 123 369 6481 19443 58329 265721 797163 2391489