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2440040 = 23561001
BaseRepresentation
bin1001010011101101101000
311120222002212
421103231220
51111040130
6124144252
726511551
oct11235550
94528085
102440040
111417269
12998088
13675815
14477328
15332e95
hex253b68

2440040 has 16 divisors (see below), whose sum is σ = 5490180. Its totient is φ = 976000.

The previous prime is 2440021. The next prime is 2440043. The reversal of 2440040 is 400442.

Adding to 2440040 its reverse (400442), we get a palindrome (2840482).

2440040 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 2439844 + 196 = 1562^2 + 14^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2439997 and 2440024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2440043) 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 3 ways as a sum of consecutive naturals, for example, 30461 + ... + 30540.

22440040 is an apocalyptic number.

2440040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2440040 is an abundant number, since it is smaller than the sum of its proper divisors (3050140).

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

2440040 is a wasteful number, since it uses less digits than its factorization.

2440040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61012 (or 61008 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 2440040 is about 1562.0627388169. The cubic root of 2440040 is about 134.6270456042.

The spelling of 2440040 in words is "two million, four hundred forty thousand, forty".

Divisors: 1 2 4 5 8 10 20 40 61001 122002 244004 305005 488008 610010 1220020 2440040