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80785407 = 3231170803
BaseRepresentation
bin1001101000010…
…10111111111111
312122000022202010
410310022333333
5131140113112
612003302303
72000443653
oct464127777
9178008663
1080785407
11416682aa
122307a993
1313976a21
14aa2ca63
15715b63c
hex4d0afff

80785407 has 8 divisors (see below), whose sum is σ = 112397184. Its totient is φ = 51515288.

The previous prime is 80785403. The next prime is 80785423. The reversal of 80785407 is 70458708.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80785407 - 22 = 80785403 is a prime.

It is a super-4 number, since 4×807854074 (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80785403) 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, 585333 + ... + 585470.

It is an arithmetic number, because the mean of its divisors is an integer number (14049648).

Almost surely, 280785407 is an apocalyptic number.

80785407 is a deficient number, since it is larger than the sum of its proper divisors (31611777).

80785407 is a wasteful number, since it uses less digits than its factorization.

80785407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170829.

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 80785407 is about 8988.0702600725. The cubic root of 80785407 is about 432.2924385229.

The spelling of 80785407 in words is "eighty million, seven hundred eighty-five thousand, four hundred seven".

Divisors: 1 3 23 69 1170803 3512409 26928469 80785407