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67109540 = 22517197381
BaseRepresentation
bin1000000000000…
…00001010100100
311200021111222112
410000000022210
5114140001130
610354220152
71443264431
oct400001244
9150244875
1067109540
1134977433
121a584658
1310b98cb4
148cacb88
155d59495
hex40002a4

67109540 has 24 divisors (see below), whose sum is σ = 149220792. Its totient is φ = 25264640.

The previous prime is 67109519. The next prime is 67109543. The reversal of 67109540 is 4590176.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24364096 + 42745444 = 4936^2 + 6538^2 .

It is a Leyland number of the form 262 + 226.

It is a junction number, because it is equal to n+sod(n) for n = 67109497 and 67109506.

It is not an unprimeable number, because it can be changed into a prime (67109543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98351 + ... + 99030.

It is an arithmetic number, because the mean of its divisors is an integer number (6217533).

Almost surely, 267109540 is an apocalyptic number.

It is an amenable number.

67109540 is an abundant number, since it is smaller than the sum of its proper divisors (82111252).

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

67109540 is a wasteful number, since it uses less digits than its factorization.

67109540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197407 (or 197405 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 67109540 is about 8192.0412596617. The cubic root of 67109540 is about 406.3760337950.

The spelling of 67109540 in words is "sixty-seven million, one hundred nine thousand, five hundred forty".

Divisors: 1 2 4 5 10 17 20 34 68 85 170 340 197381 394762 789524 986905 1973810 3355477 3947620 6710954 13421908 16777385 33554770 67109540