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67088380 = 2257942461
BaseRepresentation
bin1111111111101…
…0111111111100
311200020102221211
43333322333330
5114133312010
610353534204
71443145642
oct377727774
9150212854
1067088380
1134962547
121a574364
1310b8c488
148ca5192
155d5308a
hex3ffaffc

67088380 has 24 divisors (see below), whose sum is σ = 142672320. Its totient is φ = 26495040.

The previous prime is 67088347. The next prime is 67088381. The reversal of 67088380 is 8388076.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67088381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19651 + ... + 22810.

It is an arithmetic number, because the mean of its divisors is an integer number (5944680).

Almost surely, 267088380 is an apocalyptic number.

It is an amenable number.

67088380 is an abundant number, since it is smaller than the sum of its proper divisors (75583940).

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

67088380 is a wasteful number, since it uses less digits than its factorization.

67088380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42549 (or 42547 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 67088380 is about 8190.7496604401. The cubic root of 67088380 is about 406.3333184533. Note that the first 4 decimals are identical.

The spelling of 67088380 in words is "sixty-seven million, eighty-eight thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 79 158 316 395 790 1580 42461 84922 169844 212305 424610 849220 3354419 6708838 13417676 16772095 33544190 67088380