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80768080 = 2451009601
BaseRepresentation
bin1001101000001…
…10110001010000
312121222102222101
410310012301100
5131134034310
612003050144
72000342311
oct464066120
9177872871
1080768080
1141656288
1223070954
131396bb83
14aa26608
15715643a
hex4d06c50

80768080 has 20 divisors (see below), whose sum is σ = 187785972. Its totient is φ = 32307200.

The previous prime is 80768059. The next prime is 80768101. The reversal of 80768080 is 8086708.

It is an interprime number because it is at equal distance from previous prime (80768059) and next prime (80768101).

It can be written as a sum of positive squares in 2 ways, for example, as 18421264 + 62346816 = 4292^2 + 7896^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504721 + ... + 504880.

Almost surely, 280768080 is an apocalyptic number.

80768080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80768080 is an abundant number, since it is smaller than the sum of its proper divisors (107017892).

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

80768080 is a wasteful number, since it uses less digits than its factorization.

80768080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009614 (or 1009608 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 80768080 is about 8987.1063196114. The cubic root of 80768080 is about 432.2615300254.

The spelling of 80768080 in words is "eighty million, seven hundred sixty-eight thousand, eighty".

Divisors: 1 2 4 5 8 10 16 20 40 80 1009601 2019202 4038404 5048005 8076808 10096010 16153616 20192020 40384040 80768080