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22680769 = 139163171
BaseRepresentation
bin101011010000…
…1010011000001
31120200022011111
41112201103001
521301241034
62130043321
7363532456
oct126412301
946608144
1022680769
1111891441
127719541
134911697
14302582d
151ed0364
hex15a14c1

22680769 has 4 divisors (see below), whose sum is σ = 22844080. Its totient is φ = 22517460.

The previous prime is 22680733. The next prime is 22680787. The reversal of 22680769 is 96708622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22680769 - 27 = 22680641 is a prime.

It is a super-2 number, since 2×226807692 = 1028834564862722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22680709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81447 + ... + 81724.

It is an arithmetic number, because the mean of its divisors is an integer number (5711020).

Almost surely, 222680769 is an apocalyptic number.

It is an amenable number.

22680769 is a deficient number, since it is larger than the sum of its proper divisors (163311).

22680769 is a wasteful number, since it uses less digits than its factorization.

22680769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163310.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 22680769 is about 4762.4330966429. The cubic root of 22680769 is about 283.0648379951.

The spelling of 22680769 in words is "twenty-two million, six hundred eighty thousand, seven hundred sixty-nine".

Divisors: 1 139 163171 22680769