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540640 = 25531109
BaseRepresentation
bin10000011111111100000
31000110121201
42003333200
5114300030
615330544
74411132
oct2037740
91013551
10540640
1133a211
12220a54
1315c109
14101052
15aa2ca
hex83fe0

540640 has 48 divisors (see below), whose sum is σ = 1330560. Its totient is φ = 207360.

The previous prime is 540629. The next prime is 540677. The reversal of 540640 is 46045.

540640 = T40 + T41 + ... + T148.

540640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4906 + ... + 5014.

It is an arithmetic number, because the mean of its divisors is an integer number (27720).

2540640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 540640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (665280).

540640 is an abundant number, since it is smaller than the sum of its proper divisors (789920).

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

540640 is a wasteful number, since it uses less digits than its factorization.

540640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 540640 is about 735.2822587279. The cubic root of 540640 is about 81.4646866722.

Adding to 540640 its reverse (46045), we get a palindrome (586685).

The spelling of 540640 in words is "five hundred forty thousand, six hundred forty".

Divisors: 1 2 4 5 8 10 16 20 31 32 40 62 80 109 124 155 160 218 248 310 436 496 545 620 872 992 1090 1240 1744 2180 2480 3379 3488 4360 4960 6758 8720 13516 16895 17440 27032 33790 54064 67580 108128 135160 270320 540640