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22930809 = 311694873
BaseRepresentation
bin101011101111…
…0010101111001
31121011000011020
41113132111321
521332241214
62135253053
7365623446
oct127362571
947130136
1022930809
1111a42290
12781a189
13499b435
14308c9cd
15202e4a9
hex15de579

22930809 has 8 divisors (see below), whose sum is σ = 33353952. Its totient is φ = 13897440.

The previous prime is 22930771. The next prime is 22930813. The reversal of 22930809 is 90803922.

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

It is not a de Polignac number, because 22930809 - 27 = 22930681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 694873 = 22930809 / (2 + 2 + 9 + 3 + 0 + 8 + 0 + 9).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22930809.

It is not an unprimeable number, because it can be changed into a prime (22930009) 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, 347404 + ... + 347469.

It is an arithmetic number, because the mean of its divisors is an integer number (4169244).

Almost surely, 222930809 is an apocalyptic number.

It is an amenable number.

22930809 is a deficient number, since it is larger than the sum of its proper divisors (10423143).

22930809 is a wasteful number, since it uses less digits than its factorization.

22930809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694887.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 22930809 is about 4788.6124295040. The cubic root of 22930809 is about 284.1012376296.

The spelling of 22930809 in words is "twenty-two million, nine hundred thirty thousand, eight hundred nine".

Divisors: 1 3 11 33 694873 2084619 7643603 22930809